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Black Open Corner Case
The Black Open Corner Case is a triangle-shaped display case built to fill the 90-degree corner between two showcase units. At 18 inches wide, 18 inches deep, and 38 inches tall, it drops into the corner gap with a glass top and two adjustable tempered glass shelves — turning dead counter space into an active display position. Black melamine finish. Ships knocked down. Professional assembly available.
Triangle Shape — Open Front Access
The triangle corner case has three sides: two back panels that sit flush against the wall or counter units at 90 degrees, and an open triangular front that gives staff and customers direct access to the display shelves inside. There is no angled front face panel closing off the unit. This is the fundamental difference from a pentagon corner case. The pentagon has a fifth angled panel that creates a finished face at the corner. The triangle is fully open — merchandise is accessible from the front corner angle without opening a door or reaching around a panel.
Two Tempered Glass Shelves in the Open Corner Case
Two adjustable tempered glass shelves sit inside the display area on interior standards. Both shelves are 18 inches deep and adjust to different heights. The display area runs approximately 28 inches tall above the 10-inch base plate — enough vertical space to use both shelf levels for different product categories. Rings and small accessories on the upper shelf. Boxed goods or larger items on the lower shelf. The glass top surface adds a third display level at counter height for featured merchandise or signage. All glass in this corner display unit is tempered for retail safety.
Triangle vs Pentagon — Which Corner Case Do You Need?
The triangle and pentagon corner cases share the same 18x18x38 footprint and fit the same 90-degree counter gap. The difference is the front face. The Black Open Corner Case has no front panel — the corner is completely open and merchandise is reached from the front angle directly. The pentagon corner case has an angled fifth panel that closes the front face, giving the counter a finished look on the corner. Choose the open triangle when direct merchandise access matters more than an enclosed front. Choose the pentagon when a finished, closed corner appearance fits the store aesthetic.
Where Retailers Use This Corner Display
Any counter run that meets at a 90-degree angle has a corner gap. The open corner case fills that gap and keeps the counter looking complete rather than interrupted. Jewelry stores place it between two full vision showcases at the corner turn. Smoke shops use it at the junction of two service counter sections. Beauty supply retailers fill it with skincare, accessories, or impulse items at the counter corner where customers stand during transactions. Convenience stores, boutiques, and collectibles shops all use corner cases consistently — the corner position is one of the most visible points in the entire counter layout.
Black Open Corner Case Specifications
| Specifications | Details |
| Dimensions | 18"W x 18"D x 38"H |
| Shape | Triangle — 90-degree open front |
| Display Area Height | Approx. 28" (above 10" base plate) |
| Top | Tempered glass |
| Shelves | 2 adjustable tempered glass — 18"D each |
| Base Finish | Black melamine laminate |
| Ships | Knocked down (flat-packed) |
| Assembly | Self-assembly included / Professional assembly available |
Complete Your Counter With the Open Corner Case
The Black Open Corner Case connects with every unit in our Black Counters & Cases lineup at the same 38-inch counter height. Use it at any 90-degree junction in your counter run alongside our full vision showcases. For a closed corner with a finished front face, see our Black Pentagon Corner Case. Browse our full Ready to Ship Cases collection.
Questions or need a bulk quote? Call (800) 420-1457 or request free samples using the form on this page.
Frequently Asked Questions
What is the difference between the open corner case and the pentagon corner case?
The Black Open Corner Case has a triangle shape — three sides with a fully open front corner. Staff and customers access the shelves directly from the front angle. The pentagon corner case has five sides with an angled front face panel that closes the corner. Choose the open triangle for direct merchandise access. Choose the pentagon for a finished enclosed corner appearance.
How many shelves does the Black Open Corner Case include?
Two adjustable tempered glass shelves on interior standards, plus a tempered glass top surface. Each shelf is 18 inches deep and adjusts to different heights. The display area is approximately 28 inches tall above the 10-inch base plate.
Does this case fit between two standard showcases?
Yes. The open corner case is designed specifically to fill the 90-degree gap between two showcase units in a counter run. It shares the same 38-inch counter height as every unit in the Black Counters & Cases lineup so the counter surface aligns flush across all units.
What stores use a triangle corner display case?
Jewelry stores, smoke shops, beauty supply retailers, boutiques, convenience stores, and collectibles shops all use triangle corner cases to complete their counter runs. Any counter layout that meets at a 90-degree angle needs a corner filler — the open triangle case is the most accessible option for direct customer reach.
Is professional assembly available for this case?
Yes. Select the assembly option at checkout and the case arrives fully built and ready to place. Standard configuration ships knocked down with all hardware and instructions included. Assembly typically takes under 20 minutes.

















