Single Flat Tile Flashing + BFX Underfelt Collar 134 x 140cm VELUX EDT MK04 2000. Designed for flat roof tiles between 15mm and 40mm thick, Single Flat Tile Flashing with BFX Underfelt Collar will ensure a discreet, secure window installation, as well as provide a durable weathertight seal between your window and roof.
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