Premium Rebuild kit for F350S PowerMaster Plus and F250S Positive Placement For use on the following tools: Paslode Pneumatic Power Master Plus - 501000 Paslode Pneumatic Positive Placement Tools - 500855 Repairs the following symptoms: sluggishness, lack of power, cap air leaks, and skipping Kit Includes: 501001 Cap Gasket 095432 Post O ring 402011 Sleeve Seal 092971 Piston O ring 500249 Inner Flange O ring 501002 Outer Flange O ring 500461 Outer Cap O ring 092042 Inner Cap O ring 500463 Main Valve Assembly 092235 Mid check O ring 500407 Spring Grease tube Instructions