This part is made of high quality material, wear-resistant, durable and long-lasting. Extend the life of the tool by replacing worn or damaged parts. It is a perfect replacement for your damaged or worn-out part The Kit can fully meet everything you need for repairs, and it is easy to install, you don't need any complicated steps to get your roofing nailer repaired. Type:AB Colour:As Shown Material:MetalPackage Contents: 1 x 500407 main valve spring 1 x 501001 cap gasket 1 x 402011 sleeve 1 set x o ring kit 1 x 500866 piston bumper 1 x 402011 sealing sleeve 1 x 500407 main value spring 1 x 501001 cover washer 1 x O-ring kit Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +- 1-3cm.