Master Flow | sku: 3570320 Master Flow 12 In. To 10 In. Round Reducer The Master Flow 12 in. x 10 in. Round Reducer is made of galvanized steel. It features hemmed collar edges for enhanced strength and a secure fit. The reducer is used to transition from a 12 in. pipe to a 10 in. pipe in an HVAC system. It is suitable for... Log in for pricing