4 Pcs Boston Valve, One-way Universal Fit Air Valve For Rubber Dinghy Raft Kayak Pool Boat Airbeds, Black The product is shipped based on the color or size of the main image of the product page. Material: The Boston inflatable valve made of high quality ABS material, strong and durable, corrosion resistant, not easy to leak air. Size: The underside diameter of Threaded part is 22mm (out)/ 20mm(inner). The specific size of Boston valve can be seen in the second picture. Please check size to make sure whether your valve bung fit this plug before purchase. Application: Great for standard Boston valves replacement kit and most of Rubber Dinghy Raft Kayak Pool Boat Airbeds, etc. The Valve is a one-way inflation valve, good for quick inflation. The air valve cap design is sealed ensures anti-leak inflation. Quantity delivered: 4 pieces Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement. Sold by-YJL official store