Mr. Gasket part #1551. Chrome Fuel Line for a Holley model 4160 carb, 3310, square flange Holley with primary metering block and secondary metering plate. (3/8" tube with 8 21/32" centers) This is a Brand NEW part. They were pruchased in bulk, so they are out of the package. They have very slight scratches, but nothing you can see from more than a foot away. Retail price is $22.99. These are being sold below the wholesale price! Don't miss this deal.