Sometimes the sports balls like basketballs and football will burst if they are over-inflated because of the high inner air pressure. But how to prevent over-inflation of the inflatable balls? The most important thing is that we need to control the ball pressure. This ball pressure gauge is just such a tool to check and get accurate readings of the ball inner pressure. Feature - Color: Silver - Material: Metal - Size: About 11.00X4.00X2.20cm/4.32X1.57X0.86inch - Accurate and quick reading. Gives accurate readings in both psi and bar. - Ball pressure adjustable. Equipped with a push-type air release valves, which can be used to easily release the inner air pressure to prevents over-inflation of the balls without removing . - No battery needed. Perfect barometer tool for volleyballs, basketballs, football, soccer and other inflatable sports balls. - Clear scale: There is no color distinction between units. The pressure values of different balls are intuitive and easy to understand. - Removable: Portable and detachable, easy to change air needle. Package list: 3 x Pressure Gauge