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. It is equipped with an air release valve, which allows you to easily release air to adjust pressure of over inflated balls without removing gives both PSI and Bar readings for convenient use. Suitable for volleyballs, basketballs, football, soccer and all other inflatable sports balls. Feature - Color: Silver - Material: Steel and brass - Package size: 10 x 4.1 x 2.4 cm ( W x H) - Test Unit/ Mode: Bar, PSI - Gauge Calibration: 0-20 PSI, 0-1. - Accurate and quick reading. Gives accurate readings in both psi and bar. Maximum pressure range up to 20 psi or 1. . - Solid metal steel body, plated brass stem and thick plastic cover for lasting use, prevent from and moisture. - Easy to use. With USA type needle, works on various ball valves. Simply insert the needle into the ball to get the readings. - Ball pressure adjustable. Euipped with a push-type air release valve, which can be used to easily release the inner air pressure to prevent over-inflation of the balls without removing - No battery needed. Perfect barometer tool for volleyballs, basketballs, football, soccer and other inflatable sports balls. Package list: 1 pressure gauge