Dual Accessory (Single Gang + Double Gang) Dry Lining Installation Box with Adjustable Lugs 35mm Made from flame retardant thermoplastic Large flange around the front matches profile of accessory front plates and prevents slipping into the cavity 25mm base knockout plus 2 side cable entry points. Tough yellow nylon lugs have large bearing faces for superior strength Appropriate for fitting board thicknesses from 6.35-15mm