Rebuild kit for large body circle track 51, 53, 60 and 62 Series shocks. QA1's Rebuild Kits allow you to rebuild your circle track racing shocks. QA1 shocks are not throw-away shocks like other brands. No longer do you have to send your shocks to a rebuilder to have them fixed. Rebuild kits contain: PTFE/carbon fiber band, piston rod seal, O-rings and a travel indicator ring. Kits include components for one shock.