Welcome, this is the SRK Pro Plexi Rack door.
Designed specifically for use with Samson SRK Pro Rack (sold separately).
They are made to fit in both the front and rear rack panels, and can be easily hinged on either side (right or left) via a dual spring-loaded hinge system.
Lastly, the SRK Pro Plexi Rack Doors all have a spring-loaded locking latch handle (key included) to provide convenient/secure access to your rackmounted gear.
This is new in box.
Don't pass this by!