Brand: Allstar Performance Manufacturer's Part Number: ALL36166 Part Type: Fill Cap Kits Product Line: Allstar Performance Fill Plug Kits Automotive Fittings Part Number: AAF-ALL36166 UPC: 848238065329 Fill Cap Attachment Style: Weld-on Cap Diameter (in.): 1.500 in. Cap Material: Aluminum Cap Color: Polished Bung Material: Aluminum O-Rings Included: Yes Quantity: Sold as a kit. Notes: Weld-on bung covers 1.375 in. diameter opening. Description: Allstar Performance fill plug kits enable you to put a fill plug where you need it. They include an aluminum or steel bung for use as an inspection plug or filler plug, plus an easy-grip cap with an O-ring for a positive seal. The kits are available with a small 1 3/8 in. opening or a large 3 in. diameter opening. These weld-on or bolt-on fill cap kits are available in a variety of styles and finishes.