How to use a gas needle and pump to pump up basketball?
First install the air needle on the air cylinder. Everyone should know this step.
Twist the handle on the pump to the other side to prevent air leakage.
Get some water or spit on the eye of the basketball and the air needle to lubricate and avoid hurting the basketball.
Slowly insert, and then pump up, it may start to leak, just hit it, hit 8 or 9 points full, you must have enough flexibility.