The Envirograf multi-purpose square box is the most versatile of its kind available and has been specifically designed for most installations where services pass through fire barrier ceilings, floors, and walls.
It can be surface - mounted or recessed.
The multi-purpose box was tested to BS476 Parts 20 and 22 (1987), achieving up to 4 hours of fire protection.
Also tested at VNE to European Standard EN1363-1 (2000).
Dimensions shown are the internal size (mm) x depth (mm)
Envirograf Product 16