WUZHOU Replaceable Air Hammer Retaining Quick Spring for Pneumatic Hammer There is a 150, 190 and 250 general air hammer retaining spring which can cushion the working machine Made of carbon steel material, durable to use. It is easy and convenient to replace. Small body and stable performance. Colour: Black Size: Outer Diameter: 35MM, Inner Diameter: 28MM, Number of Coils: 8 Delivery Quantity: 1 Piece Warm prompt: 1.As different measuring methods,it will occur 1-3 cm deviation about the items,please ensure that it is okay for you before ordering. 2. Because of different monitors and lamplight, the picture may not reflect the actual color of the item, really thank you for your kind understanding 3. Only the above package contents, excluding other products.