We found a good kit with everything we need at a reasonable price. There is an accurate digital pressure gauge, a powerful 250 PSI pneumatic cartridge, and various adapters for all occasions. Made of high quality stainless steel, brass and rubber. The screen automatically turns off after 20 seconds of inactivity to conserve battery power. A professionally calibrated gauge gives readings with only 1% deviation from the exact pressure of your tires. Accurate measurements in four different units. Kit includes straight tip, gauge, hose, bleeder valve all in one unit. Ideal for cars, bicycles, motorcycles and boats, as well as air mattresses, sports balls and balloons.