This Auction is for a Chrome Fuel Line For Holley 4150 Mechanical Secondary Double Pumper Carbs it measures 9 5/16 fits carbs with front metering block and rear metering Blocks.Fits carbs with 9-5/16" spacing between inlet threads!! For Vacuum Secondary Carbs with 8-21/32" Spacing Features: Has Silver Brazed Connections Chrome Plated 3/8 In Copper Hex Design Fittings Specification: Inlet Quantity: One Inlet Attachment: Hose barb Fuel Line Inlet Size: 3/8 in. Outlet Quantity: Two Outlet Attachment: Male threads Outlet Size: 5/8-18 in. Fuel Line Type: Hard tube Adjustable: No .