NOS(New Old Stock) “S” Clips. These Clips retain the Rubber Vacuum Hose for the Front to Rear 340 and 440 6-Pak Carburetors together with the Fuel Line to keep the Vacuum Hose from Flopping around and possibly get worn or damaged. We have seen some Original 6-Paks with only (2) of these installed, although some people have told us that they saw (3) of them, but cannot confirm this ourselves. Sold individually, order as required. Limited Supply. OEM Part # 2925705.