Length: 389 mm Width: 24 mm Projection: 16.5 mm features: Trimvent gas regulation vent with aluminium slot Product is white, if you require a brown finish please call us on 0207 228 1185 Fixing centres: 368.5 mm Complies with BS5440 Part 2 Specification for installation and maintenance of ventilation of gas appliances and Building regulations Part J Combustion appliances and fuel storage systems Deflects air up and inside Free Area (EA) mm2 4000 2 ventilators are supplied per pack (one fitted internally and one fitted externally) Supplied with warning label, screws and fitting instructions Aluminium