Tapered Cap - Inside Diameter Range 10.39 - 12.52 mm | 0.409 - 0.493 in ; Outside Diameter Range 12.22 - 13.89 mm | 0.481 - 0.547 in

Blue LDPE Tapered Wide Flange Cap & Plug can cap fittings or plug holes with a 22.1 mm | 0.870 in diameter flange adds protection and prevents pushing the plug through the mating part.