[High Quality]: Made of quality high dense PP plastic, sturdy, anti-corrosion and durable.[Cap Desgin]: The air valve cap design is sealed ensures anti-leak . The upside diameter/length of Threaded part is 22mm (out)/ 17mm(inner), the underside diameter/length of Threaded part is 22mm (out)/ 20mm(inner). check size to make whether your valve bung fit this plug purchase.[ Rubber Pad]: The bottom of the air plug has a rubber mat which can prevent leaks more effectively, give you protection.One-way valve, quickly inflated.[Quickly Deflation]: It will fit into a hole that is about 20mm/0.78 inch, boston valve to help quicker and deflation. Easy to fit, good performance and long life.[Come in Pair]: Good replacement accessory for your inflatable boat. Fits most inflatable boat, raft, rubber dinghy, etc. pay attention to the size purchase, and gas nozzles are not all suitable for all sizes of airbeds and inflatable boats, size , like netted .Colour: blackMaterial: PPPackage Contents:5 x Air ValveOnly the above package content, other products are not included.Note: Light and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.