The protective air hose is professionally pressed at both ends with a 1/4 “union nut (17mm wrench size). Features: Protective air hose presses with 2pcs 1/4” right thread nuts. The hose itself has an inner diameter of 6.3mm and a wall of 3.5mm, so a total diameter of about 13mm. Approved for use in air, compressed air, nitrogen, argon and carbon dioxide. The maximum approved value is 20 bar and the cold resistance is -30 bar. Specifications: Hose Length: 1.5m / 4.92ft, 2m / 6.56ft (optional) Package Weight: 1.5m: 350g / 12.35ounces 2m: 400g / 14.11ounces Package Size: 250 * 250 * 20mm / 9.84 * 9.84 * 0.79in Packing List: 1 * Protective Air Hose