This Tomco 421 Carburetor Stop Leak Stop Plugs caters to Quadrajet Secondary Metering Wells. It is ideal for those looking for a reliable solution to address leaks in their carburetor. With Tomco as the brand and 421 as the manufacturer part number, you can trust the quality of this product. This item is perfect for those who need to replace their old carburetor stop leak stop plugs. It is a great addition to any engine repair kit.