1 x grey cowl with WHITE 110 x 54mm spigot that fits over 110 x 54mm Ducting tube systems. Available available in white,terracotta,beige & brown. Effectively allow for the extraction of air. For easy installation on an external wall of a dwelling. Includes back draught flap to reduce wind blowing black into the home free moving flap not 100% air tight. Width mm: 155 Length mm: 155 Manufacturer: Polypipe Ventilation Brand Name: Domus Material: PVC Despatched quickly and should be with you in 2 - 3 days with economy delivery.