About the Product: 1. Ball pump needle set measurement: 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 length2. Quality material: this set of tools is made of quality metal and plastic, strong and durable, not easy to get break, allow you to use them for a long time3. General design: these needle inflator tools are in general size and design, good accessories for compressors, electric air pumps and almost any hand pumps4. Wide range of usage: you can apply this set of needles with pump to inflate inflatable toy, balloon, basketball, gym balls, sports equipment, bicycle tires, etc. Features: 1. Wide application: you can combine these valve adaptors with pump to inflate inflatable toy, balloon, gym Ball, sports equipment, bicycle tires, etc.2. Versatile accessories: these needle inflator tools are in general size and design,easy to use and store; does not take up much space at all,good accessories for compressors, electric air pumps and almost any hand pumps Specification: Color: gold and blackMaterial: metal and plasticSize:Needle size: Length: approx. 38 mm, Outside diameter: 7 mm, Inside diameter: 4 mmmetal adapter size : approx. 1.7 x 0.9 x 0.7 cmplastic nozzles with metal thread size : 7mm in Diamter(the side with thread)