Carlisle Brass BP712SB40SB Lines Cylinder Knob on Backplate (LEAD TIME: 2-3 DAYS)

This item is on a direct delivery and will be delivered separately. They may also be subjected to longer lead times and cannot be returned and/or cancelled once ordered.

Sprung internal and external flaps which allows the external flap to open to approximately 147, with an internal opening to approximately 90. Acetal torsion bars operates the flaps. Supplied with an external weather seal, along with an internal draft s