SL9676 External Gravity Flap Grey 100mm 4" Securlec s107359

150 x 150mm vent - 100mm spigot for easy connection
Gravity-operated flap - automatic opening and closing
Prevents backdrafts - also keeps out debris and insects
Durable - weather-resistant materials for long-lasting use
Easy to install - fit with Round Ducting
Versatile - suitable for residential, commercial or industrial use
Essential ventilation - for kitchens, bathrooms or utility rooms
Not suitable for gas appliances