Made in the USA
Expert sizing support
NSM

National Safety Mirror

Indoor Acrylic Rectangular Convex Mirror — Hardboard Back

Product specs

Features and technical details

  • ✓Wide-angle convex field of view
  • ✓Suitable for indoor applications
  • ✓Made in the USA
  • ✓Multiple orderable configurations

Indoor Acrylic Rectangular Convex Mirror — Hardboard Back

SKU SRTABS-HB

From$93.95— $232.95

or 4 interest-free payments of $23.49 with Afterpay

Compare every SKU, description, and price in the options table below before adding to cart.

This indoor rectangular convex mirror pairs an acrylic lens with hardboard backing for dry office corridors, warehouse aisles and indoor blind corners. The rounded rectangular outline can fit beneath a low ceiling where the full height of a round mirror would be inconvenient.

Expert sizing support
Quality guaranteed
Made in the USA
Expert support

Best for

Rectangular Convex MirrorWarehouse blind cornersParking exits

Sizing help

Buyer fit check

Choose this indoor rectangular mirror when a round mirror is too tall or visually bulky

Indoor rectangular convex mirrors are useful in tight aisles, low ceilings, corridors, and shelf runs where horizontal coverage is more important than a circular footprint.

Good fit for

  • ✓Retail aisles, stockrooms, office corridors, garage interiors, and low-clearance indoor corners
  • ✓Blind spots where the mirror must sit below a ceiling, soffit, pipe, or shelf run
  • ✓Buyers who need one-direction convex visibility without the height of a round mirror

Choose another style when

  • →Choose outdoor rectangular convex mirrors for weather exposure.
  • →Choose dome mirrors when traffic approaches from multiple directions at once.
Compare convex mirror styles
Satisfaction Guaranteed
Live Customer Support
Secure Payments
Guaranteed Safe Checkout
VisaMastercardAmexDiscoverPayPalApple PayG Pay

Specifications

Lens material
Acrylic
Field of view
160° convex
Sizes
12″ · 18″ · 20″ · 24″
Brackets
Telescoping bracket
Made in
USA

Indoor Acrylic Rectangular Convex Mirror — Hardboard Back — at a glance

  • Available sizes 12x18 · 18x26 · 20x30 · 24x36
  • Lens material Acrylic
  • Backing Hardboard
  • Mirrors are made to order in Sturgis, Michigan. Some common mirrors may be available sooner. Made-to-order mirrors are typically ready to ship within 4–9 business days.

Options

Available sizes, brackets & prices

Compare each option by SKU, price, and description, then add the exact row you want to cart.

Size:
⌕
SKUSizeBracketCovers*PriceDescriptionQtyAdd
RTH-12X18
12″Telescoping bracketup to 12 ft
$93.95
Rountangular Indoor 12 inch x 18 inch Acrylic Mirror with Hardboard Backing
RTH-18X26
18″Telescoping bracketup to 18 ft
$134.95
Rountangular Indoor 18 inch x 26 inch Acrylic Mirror with Hardboard Backing
RTH-20X30
20″Telescoping bracketup to 20 ft
$187.95
Rountangular Indoor 20 inch x 30 inch Acrylic Mirror with Hardboard Backing
RTH-24X36
24″Telescoping bracketup to 24 ft
$232.95
Rountangular Indoor 24 inch x 36 inch Acrylic Mirror with Hardboard Backing

* Coverage estimate uses the 1-inch = 1.5-foot guideline from the NSM sizing guide.

Indoor Acrylic Rectangular Convex Mirror — Hardboard Back description & specifications

This indoor rectangular convex mirror pairs an acrylic lens with hardboard backing for dry office corridors, warehouse aisles and indoor blind corners. The rounded rectangular outline can fit beneath a low ceiling where the full height of a round mirror would be inconvenient.

Using an oblong aisle mirror in a dry interior

Measure the available height and width beneath ceilings, beams and services. Allow for the bracket projection and the adjustment needed to aim the reflection toward the observer. A low-clearance convex mirror still needs a location that keeps it clear of pedestrians, equipment and vehicles.

Hardboard backing is for dry indoor locations

Keep hardboard away from rain, wet cleaning and persistent humidity. A covered but damp parking structure may require an outdoor-rated model instead. Confirm the supplied bracket for the selected size and leave room to aim the mirror.

Size the rectangle around the sightline

Compare both listed dimensions rather than treating the mirror width as a round diameter. Record the observer-to-mirror distance, the hidden approach and the usable mounting space. Share those measurements and a site photo for help choosing a size; no shape or size guarantees every blind spot will be visible.

Browse the rectangular convex mirror range, check the mounting guide, or compare backing types. For weather exposure or persistent humidity, see the outdoor-rated rectangular mirror.

Mounting & installation

Backing: Hardboard

Lens Type: Acrylic

Rectangular Mirror Size: 12x18, 18x26, 20x30, 24x36

Indoor/Outdoor: Indoor Rated

Shipping & returns

Made-to-order mirrors are typically ready to ship within 4–9 business days.

For non-warranty returns, request an RMA within 30 days of delivery. Approved returns must be new and in their original packaging; a 25% restocking fee and buyer-paid return shipping apply.

Report shipping damage within seven business days of delivery.

If you need a bulk quote, project guidance, or confirmation before ordering, you can request a bulk quote or call NSM at 678-214-3440 before checkout.

FAQ

How long do mirrors take to ship?

Inspection mirrors typically ship within 3–5 business days. Other mirrors are made to order in Sturgis, Michigan, and are typically ready to ship within 4–9 business days. Some common mirrors may already be available; contact NSM for current shipment times.

Sources: National Safety Mirror shipping policy

How do acrylic and polycarbonate compare for impact and scratching?

Impact resistance describes resistance to a strike or shattering; it does not describe surface hardness or scratch resistance. NSM uses approximate material comparisons of 15× glass for acrylic and 250× for polycarbonate. Published figures vary by grade, thickness and test: Advanced Plastiform, for example, cites about 10× for acrylic and 250× for polycarbonate. Acrylic is generally more scratch resistant than uncoated polycarbonate, while glass is harder at the surface. These material comparisons are not a model-specific test rating or a bullet-resistance certification.

Sources: KastLite: acrylic versus polycarbonate · Advanced Plastiform: impact and scratch resistance · Palram: polycarbonate glazing material comparison

What are the return and warranty terms?

Report shipping damage within seven business days of delivery. For non-warranty returns, request an RMA within 30 days of receipt and return the merchandise within 30 days after the RMA is issued. Approved returns must be new and in original packaging; a 25% restocking fee and buyer-paid return shipping apply. Special, discounted, large-quantity and ALL SALES FINAL orders are excluded as detailed in the Returns policy. The manufacturer provides a one-year replacement warranty for defects in material or workmanship under normal use and care, subject to its full warranty terms.

Sources: National Safety Mirror returns policy · National Safety Mirror manufacturer warranty · National Safety Mirror shipping policy

How should I clean and care for an acrylic mirror?

Use spray wax or plastic polish on the front surface and wipe with a clean, soft cloth. Do not use glass cleaners. Washing with a soft cloth works, but repeated washing can gradually create fine scratches. Read the Acrylic Mirror Care guide for cleaning, drilling, and fastener precautions.

Sources: SDM Acrylic Mirror Care

How do I choose the right mirror for my space?

Start with the application — driveway exit, warehouse aisle, blind intersection, retail surveillance, or vehicle inspection — then size by viewing distance using the 1 inch of diameter per 1 foot of viewing distance rule. If you'd like a recommendation, contact NSM with your installation context and we'll narrow the right size, lens, backing, and mount.

What if I need help picking the exact configuration?

Use the live options table above to compare every purchasable row by size, bracket, and price. If you're between two configurations, contact NSM directly before checkout — bulk pricing, government quotes, and project-specific sizing guidance are all available at no charge.

See more questions in the full FAQ.

Related guides

Related mirrors and guides

Compare similar mirrors, check the mounting options, or read up on sizing before you order.

Mounting guide

Use the bracket and placement guide before choosing the final SKU and hardware.

Mirrors for convenience stores

A convenience store needs two kinds of mirror: a dome mirror or DomeVex wide-view mirror mounted where the clerk can see the whole sales floor from the register, and smaller convex mirror…

Mirrors for parking garages

A parking garage needs a convex mirror at every point where a driver has to commit to a turn without seeing what is around it: ramp turns, the exit onto the street, aisle corners at colum…

Related

You may also like