Features: 1.100% brand new and high quality. 2.There is a 150, 190 and 250 general air hammer retaining spring which can cushion the working machine 3.Made of carbon steel material, durable to use. 4.It is easy and convenient to replace. 5.Small body and stable performance. Specification: Condition: 100% New Color: Black Material: Carbon Steel Number Of Wire Rings: 8 Turns Weight: Approx. 58g / 2.0oz Outer Diameter of the Spring Ring: Approx. 34.4mm/ 1.4in Inner Diameter of Spring Coil: Approx. 28mm/ 1.1in Wire Diameter: Approx. 3.18mm/ 0.1in Package List: 1 * Air Hammer Retaining Spring 1100% brand new and high quality. 2There is a 150, 190 and 250 general air hammer retaining spring which can cushion the working machine 3Made of carbon steel material, durable to use. 4It is easy and convenient to replace. 5Small body and stable performance.