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270° Corner Dome Mirror - Acrylic Safety Mirror
6 configurations · from $105.95

SKU ONV-270
or 4 interest-free payments of $26.49 with Afterpay
Compare every SKU, description, and price in the options table below before adding to cart.
270-degree acrylic dome mirror for outside corners, columns, wraparound hallway turns, and projecting wall edges where visibility is needed from three approach directions.
Best for
Sizing help
Use the 1 inch = 1.5 feet guideline as a starting point, then adjust for vehicle speed, lighting, mounting height, and obstructions.
Buyer fit check
A 270-degree dome covers three approach directions from an outer corner, column, or projecting wall edge. It is not a full 360-degree overhead dome; it is for corners where one quadrant is blocked by the structure.
Good fit for
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Pick your configuration below. Each row is a real, purchasable SKU with the size, bracket, and backing already paired.
Options
Compare each option by SKU, price, and description, then add the exact row you want to cart.
| SKU | Size | Mounting | Covers* | Price | Description | Qty | Add |
|---|---|---|---|---|---|---|---|
ONV-270-18 | 18″ | Wall or ceiling screw mount | up to 27 ft | $105.95 | 18 inch 270 Acrylic Mirror Dome With No Back | ||
ONV-270-18-HB | 18″ | D-ring wall mount | up to 27 ft | $129.95 | 18 inch 270 Acrylic Mirror Dome With Hardboard Backing | ||
ONV-270-18-PB | 18″ | D-ring wall mount | up to 27 ft | $139.95 $138.65 | 18 inch 270 Acrylic Mirror Dome With Plastic Backing | ||
ONV-270-26 | 26″ | Wall or ceiling screw mount | up to 39 ft | $173.95 | 26 inch 270 Acrylic Mirror Dome With No Back | ||
ONV-270-26-HB | 26″ | D-ring wall mount | up to 39 ft | $188.95 | 26 inch 270 Acrylic Mirror Dome With Hardboard Backing | ||
ONV-270-26-PB | 26″ | D-ring wall mount | up to 39 ft | $198.95 | 26 inch 270 Acrylic Mirror Dome With Plastic Backing |
* Coverage estimate uses the 1-inch = 1.5-foot guideline from the NSM sizing guide.
The newly designed "270 Outer Corner" mirror is something you may not have seen before. Most quarter-dome mirrors are designed to fit on an inside corner, giving you an approximately 90-degree view. This mirror, the 270 viewings, 3/4 dome mirror fits around the outer junction, creating a 90-degree wall. It provides a 270-degree view and is an excellent addition to safety and security when coming around a corner.
Introducing the revolutionary "270 Outer Corner" mirror, a cutting-edge design bound to leave you astounded. In a world where quarter-dome mirrors have become the norm, this offers an unparalleled viewing experience. While traditional quarter dome mirrors are primarily designed to fit snugly on the inside corner, providing a mere 90-degree view, our groundbreaking 270-degree viewings, 3/4 dome mirror takes things to a whole new level.
Imagine a mirror that effortlessly wraps around the outer junction, seamlessly melding with your surroundings. With its innovative construction, this mirror grants you an expansive 270-degree view, presenting you with a panoramic perspective that enhances safety and security.
Gone are the days of apprehension when maneuvering around corners. With the addition of our "270 Outer Corner" mirror, you can confidently navigate any space, assured that you have an extended field of vision. Whether it's a bustling city street, a busy industrial facility, or a crowded parking lot, this mirror acts as an extra set of eyes, ensuring you remain aware of your surroundings from every angle.
The benefits of this state-of-the-art mirror extend far beyond the realm of personal safety. Businesses can also reap the rewards of increased security by installing the "270 Outer Corner" mirror in their establishments. Whether monitoring blind spots, deterring potential theft, or maintaining optimal visibility in high-traffic areas, this mirror is an invaluable asset.
Moreover, the sleek and modern design of the "270 Outer Corner" mirror effortlessly complements any setting. Its aesthetic appeal seamlessly integrates into various environments- an upscale hotel, a contemporary office space, or a vibrant retail store. This mirror enhances safety and adds a touch of sophistication to any space it graces.
The advent of the "270 Outer Corner" mirror marks a significant leap forward in reflective technology. Its ability to provide an expansive 270-degree view sets it apart from conventional mirrors. Offering a remarkable combination of safety, security, and style, this mirror is a game-changer in visual perception. Embrace the future of reflection and embrace the "270 Outer Corner" mirror.
There are two sizes to choose from: an 18-inch and 26-inch 3/4 dome mirror with no backing, hardboard backing, and plastic backing. If mounting this mirror outdoors, it is recommended to use the plastic backing, while the hardboard backing is okay for use in a covered garage.
The lens material is constructed of acrylic.
Dome Mirror Size: 18 inch, 26 inch
Backing: No Backing, Hardboard, Plastic Backing
Lens Type: Acrylic
Indoor/Outdoor: Indoor Rated, Outdoor Rated
Dome Viewing Angle: Outside Corner Dome
Mounting PDFs
Download the matching installation sheets or review the Dome mirror mounting FAQ.
Most National Safety Mirror orders ship quickly from the USA. Exact lead time depends on the product family, size, and bracket configuration selected.
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.
What is the difference between full dome, half dome, and quarter dome mirrors?
Full domes provide near 360-degree overhead visibility and are used above open areas or four-way intersections. Half domes are useful at T-intersections or wall-adjacent areas. Quarter domes fit corners and L-shaped corridor intersections.
How are half dome and quarter dome mirrors mounted?
Half dome and quarter dome mirrors usually mount to walls, ceilings, or corners through pre-drilled rim holes or d-loop rings on backed versions. Install them into solid material or appropriate anchors at a height that gives pedestrians and equipment operators a clear view.
When should I use a full dome mirror instead of a convex mirror?
Use a full dome when people, carts, forklifts, or customers approach from multiple directions and overhead panoramic visibility is needed. Use a wall-mounted convex mirror when the primary need is one or two approach directions around a corner or obstruction.
Why does my quarter dome mirror look smaller than the size I ordered?
A quarter dome uses the radius of the original full dome as its straight-edge measurement. For example, a 32 inch quarter dome will have straight edges of about 16 inches because it is one quarter of a 32 inch full dome.
See more questions in the full FAQ.
Related guides
Compare similar mirrors, check the mounting options, or read up on sizing before you order.
Use the category guide to compare quarter, 270-degree, half, full, acrylic, and polycarbonate domes.
Quarter dome mirrors fit compact inside corners, hallway turns, and aisle-end blind spots.
Full domes fit open four-way intersections where people approach from every direction.
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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…
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