10/20/30pcs Multiple Packaging Options, This Metal Inflation Needle Set Comes In Various Sizes, Compatible With All Types Of Manual Air Pumps And Electric Inflation Pumps, Dedicated Replacement Accessory For Ball Inflation. Made Of Solid Metal One-Piece Construction, Smooth Surface Resistant To Rust, Standard Needle Thickness, Smooth Insertion And Removal Without Damaging Ball Inner Bladder, Regular And Secure Threaded Interface, No Air Leakage After Connecting To Air Pump.