Features Premium Material The air hammer spring is made of carbon steel and is durable. Universal Compatibility There is a 150, 190 and 250 general air hammer retaining spring, which can cushion the working machine. Easy Operation This air hammer retaining spring is easy and convenient to replace. Compact and portable design: small body and stable performance. After-sale Service:We stand behind all our items with product warranty and promise to provide you with the best customer care! If you have a problem with our pneumatic hammer spring, please contact us by email. We will do our best to reply you within 24 hours. Specification: Condition: 100% Brand New Colour: black. Material: carbon steel. Number of wire rings: 8 turns. Weight: approx. 58 g / 2.0 oz. Outer diameter of the spring ring: approx. 34.4 mm / 1.4 inches. Inner diameter of the spring coil: approx. 28 mm / 1.1 inches. Wire diameter: approx. 3.18 mm / 0.1 inches. Features: Made of carbon steel material, durable in use. The replacement is easy and convenient. Brand new and high quality. There is a 150, 190 and 250 general air hammer retaining spring that can cushion the working machine Small body and stable performance. Package list: 1 x air hammer retaining spring Package List