Connecting element for cantilever box for drywall 21 x 21 mm, yellow

Connecting element for cantilever box for MULTIFIX plasterboard. Made of refractory polypropylene.
The accessory has the following dimensions:
- length: 21 mm
- width: 17.5 mm
- depth: 21 mm
It has a low degree of protection IP20, which means that it can only be used internally.
The connecting element is yellow.