Suitable for all kinds of vent ducting from waste pipes to bathroom fans. Allows a 10,000mm² air flow per unit providing an unobtrusive, economical, high or low level roof vent. UV-stabilised durable polypropylene.

Fit before or after installation of soffit boards. Specifically to prohibit entrance of large insects. Use 70mm dia. holesaw.

Smooth leading edge for fitting on the top of fascia to ensure constant air flow into roof space between fascia board and felt. Suited to new builds and refurbishments. Allows constant 10mm² air flow.