Product description Material: copper + rubber Size: approx. 8 cm length, approx. 3.5 cm diameter, error of approx. 1 cm Quantity: 1 piece ; ck Package content: 1 * SUP paddle board Fast Inflation: Easy to change, quick to inflate, can be inflated in 5-10 minutes depending on pump speed and strong seal protection. Great replacement accessory for various kayaking trips. Easy to carry: The air pump converter is small, light and Easy to carry. You can even put it in your pocket when you go out boating. Universal fits most inflatables, river rafts, kayaks, canoes, stand-up paddles and so on. Combine Other Tools: This air valve adapter uses a valve fitting to interface with an air compressor or bicycle tire pump, use the extra thin washer provided or swap the washer with your washer for board / kayak / boat valve cap to get one to achieve a good airtight fit.