About this item High Quality: This Inflatable Air Valve is made of quality high dense ABS plastic, sturdy, anti and durable. Size: Diameter of Thread Part: Approx. 20 mm / 0.78 inch. Length of Thread Part: Approx. 16 mm / 0.62 inch. Design: The fine design with a valve ensures antileak inflation. The bottom of the air plug has a rubber mat which can prevent leaks more effectively, give you safer protection. Quickly Inflation & Deflation: The Air Valve is a oneway inflation valve, good for quick inflation. Easy to fit, good performance and long serve life. Wide Application: This Boston Valve fits most inflatable boat, raft, rubber dinghy, etc. Package Included: 2 * Air Valves. Comes in pair, good replacement accessory for your inflatable boat. Size: Diameter of Thread Part: Approx. 20 mm / 0.78 inch. Length of Thread Part: Approx. 16 mm / 0.62 inch. Design: The fine design with a valve ensures antileak inflation. The bottom of the air plug has a rubber mat which can prevent leaks more effectively, give you safer protection.