LL Building Products | sku: 3584294 Master Flow 18 in. Starting Collar The Master Flow 18 in. Starting Collar is suitable for most HVAC applications. It provides a transition from a flat surface like a plenum (made from metal, duct board or insulated) to round pipe or insulated flexible duct. It can be used with duct board,... Log in for pricing
LL Building Products | sku: 3584293 Master Flow 16 in. Starting Collar The Master Flow 16 in. Starting Collar is suitable for most HVAC applications. It provides a transition from a flat surface like a plenum (made from metal, duct board or insulated) to round pipe or insulated flexible duct. It can be used with duct board,... Log in for pricing