Made of PVC material, durable, corrosion resistant and can be used for a long time. Seal design The plug ensures that the boat will not leak. The valve is a one-way inflation valve that facilitates rapid inflation. Dimensions The thread diameter is 20mm and the height of the threaded part is 16mm. Check the size of the inflation port before purchase to determine if the valve is suitable. Simple to use It will fit into approximately 0.87 inch hole (boston valve) to speed up inflation and deflation. Easy to install, good performance and long service life. Universal Valve Good replacement accessory for your inflatable boat. Suitable for most boats, rafts, inflatable boats, etc. Note: The data are all measured manually, please allow 1-3cm error due to differences in light and display, There may be color differences, please refer to the actual item received. 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.