Features: With the for valve in the closed position, insert the Schrader for valve fitting and rotate to lock- in place. Remove the cap on the fitting, and connect a standard electric pump. Use your compressor or tire pump to easily reach suggested PSI within 5-10 min, the large the inflation pump you use, the fast the inflation. Widely applicable to most paddle boards, canoes, rubber boats, assault boats, dinghy, kayak, etc. Made from high strength hard plastic and alloy, solid structure and saving labor, strong seal and anti-leakage. Because the compressors/tire pumps take- for time to inflate, it is recommended to inflate the board by hand until it becomes difficult to pump, and then use the adaptor to top- off the pressure. Specifications: Material: Nylon ABS Alloy Length: approx 3.4 for cm Width: approx 3.4 for cm Height: approx 7.8 for cm Air inlet diameter: approx 7.6mm Note: Please allow 1-3cm error due to manual measurement. pls make sure you do not mind before you bid. Due to the difference between different monitors, the picture may not reflect the actual color of the item. Package includes: 1x Pump Adaptor