Overfeel 10Pcs Metallic Air Inflation Needle Ball Pump Needle for Sport - Football Basketball Soccer GYM Can be applied for air pump, hand pump, ball pump Fit for inflate soccer balls, basketballs, volleyballs, footballs, netballs, and so on Highly durable for your daily use. Length: approx. 38 mm; Outside diameter: 7 mm; Inside diameter: 4 mm