Ball Pump Needle Set Measurements: The metal needle for balls has a diameter of 0.7 cm and the needle is approximately 3.75 cm / 1.5 inches long. HIGH-QUALITY MATERIAL: This tool kit is made of high-quality metal and plastic, strong and durable, not easy to break, and can be used for a long time. Overall Design: These inflation needles are of general size and design, good accessories for compressors, electric air pumps, and almost any hand pump. Wide Range of Use: You can use this needle set with a pump to inflate inflatable toys, balls, basketballs, gym balls, sports equipment, bicycle tires, etc. These inflation needles are of general size and design, good accessories for compressors, electric air pumps, and almost any hand pump. Wide Range of Use: You can use this needle set with a pump to inflate inflatable toys, balls, basketballs, gym balls, sports equipment, bicycle tires, etc. Specifications: Material: metal and plastic. Quantity: 3 pieces. Contents: 1 metal needle for balls (American thread). 2 plastic nozzles with metal thread. Note: Keep out of reach of children under 3 years old. You should also keep the products away from pets.