2 x Grey Gas Drop Out Round Floor Vent 75mm x 120mm

2 x Grey Gas Drop Out Round Floor Vent 75mm x 120mm This item reqiures a 50mm diameter hole to be cut through the floor to allow for fitting, the actual face of the vent is 75mm diameter. The stem of the vent is 120mm overall length but is conveniently marked at 35mm & 75mm to allow for cutting down if required. Does NOT include fixing screws. Required below any potential appliances and gas connections where a leak may be possible. Gas will drop through the floor rather than filling the area with flammable gas. Also available in Black.