Made of solid Zinc Alloy. It's 0.8 inch in diameter on the valve side and 0.55 inch diameter on the hose side.
Strong and durable, hardly break, great replacement for the plastic valve adpater.
Fits snugly and works great for the paddle board air compressors, inflatable kayak electric pum,floating dock.
Perfect air hose attachment for most paddle board pump which comes with inner threaded (screw-in) connection parts-Univisal fit and also compatible with Tuomico Outdoor Master SereneLife Swonder FBSPORTS AGPTEK Seamax electric paddle board pump hose connection.
3 Gaskets are inlclued to enable a better sealing with the paddle board valve. Following the thickness of the washiers: 0.21IN(5MM, Red), 0.16IN( 4MM, Blue) , 0.13IN(3MM,Yellow) .