VELUX BFX 1000 Underfelt Collar Size (w x h):FK06 (66 x 118 cm) if purchased as an add-on

if purchased as an add-on

Multiple blinds can be programmed into one wall switch for simultaneous operation

Manually operated with opening handle

This airtight

allowing rain and dirt to drain away

VELUX BFX 1000 Underfelt Collar Size (w x h):FK06 (66 x 118 cm) if purchased as an add-onDescription: The VELUX BFX underfelt collar includes a transverse drainage gutter ensures a fast connection between the VELUX roof window and the roofing felt membrane. It helps to protect against drafts and wind driven rain and snow around the window installation. It comes as one piece making fitting easy, especially around the corners. The transverse drainage gutter included also prevents any water ingress around the roof opening caused by missing