1: the screw thread of metal ball needle is 0.7 cm/ 0.28 inch in diameter and the needle is approx. 3.75 cm/ 1.5 inches in total length.
2: made of quality metal and plastic, strong and durable, not easy to get break, allow you to use them for a long time; for compressors, electric air pumps and almost any hand pumps.
3: Air Pump Maintenance Kit: for Soccer Balls, Basketballs, Volleyballs and Footballs, Balloon, Swim Ring, Inflatables Toys, etc.
4: package includes: 6 piece of metal ball needle (American thread), 4 pieces of plastic nozzles with metal thread.