Durable High quality : These air pump needles are made of high quality, durable stainless steel to prevent easy bending, damage or breakage. . Standard ball pump needles: The standard shape means that you can use them with different types of air pumps, hand pumps, ball pumps, bicycle pumps, etc. . Ball inflation needle length: about 38mm Outside diameter: approx. 7 mm Inner diameter: approx. 4.6 mm. Great gift for all ball sport lovers such as coaches, referees, soccer players, basketball players, coaches and so on. . Pros: These stainless steel soccer ball pumps have a rigid design that can withstand any type of breakage. Portable and lightweight, easy to use and store in your pocket outdoors. . The ball pump needles are widely used: Universal design as our ball pump needles can be used for a variety of inflatable sports balls such as soccer, football, basketball, volleyball, rugby, handball, netballs, yoga ball and more. .