Specification:Type: Pneumatic Extension SetQuantity: 10 PcsMaterial: Chrome vanadium steelColour: Blackthe inside diameter of:10 mm / 0.39 inch, 12 mm / 0.47 inch13 mm / 0.51 inch, 14 mm / 0.55 inch15 mm / 0.59 inch, 17 mm / 0.67 inch19 mm / 0.75 inches, 21 mm / 0.83 inches22 mm / 0.86 inch, 24 mm / 0.94 inchBox size: 31 * 11 * 5cm / 12.18 * 4.32 * 1.92inch (L * W * H)Feature:The pneumatic extension sleeve is made of high-quality chrome vanadium steel material, which is tough, hard, wear-resistant, durable, and has a long service life.The pneumatic extension sleeve kit comes with a portable plastic box for easy storage and carrying.The pneumatic extension sleeve with electrophoretic black surface is not easy to fade and has better wear resistance.The pneumatic expansion sleeve kit includes 10 sleeves of different sizes, which can meet different usage conditions.Pneumatic extension sleeve kits are widely used in trucks, cars, vans and other car types, which are practical tools in garages.The package includes:1 *Pneumatic extension sleeve set1 * plastic box