VELUX BDX PK04 2000 Insulation and Underfelt Collar - 94cm x 98cm
Features & Benefits: VELUX BDX PK04 2000 Insulation and Underfelt Collar - 94cm x 98cm. Easy to install, the BFX underfelt collar ensures a perfect fit with a watertight seal between the roofing underfelt, battens and window.