Master Flow | sku: 3570335 Master Flow 4 In. Fresh Air Vent Master Flow Fresh Air Vents come with a built-in screen to prevent bird entry. They can be used to vent a combustion system or anywhere fresh air intake is needed. Constructed of galvanized steel.Built-in bird screenSturdy galvanized steel... Log in for pricing
Master Flow | sku: 3570357 Master Flow 16 In. X 35 In. Galvanized Panning Master Flow 16 in. x 35 in. Galvanized Panning is used to seal the underside of a joist space. This panning is constructed with sturdy 30-Gauge galvanized steel. It can be cut to size to suit a variety of applications.30-Gauge galvanized steel provides... Log in for pricing