This re-seal kit for the Benjamin Discovery and Maximus PCP Rifles (.177 and .22 caliber) contains: Transfer Port Seal Valvestem Breech Screw Valve housing internal seal Valve external seals (2) Valve stem outer seal Fill adapter seals (2) Gauge block outer seals (2) Gauge/block o-ring Fill cap retainer seal Bolt o-rings (one .177, one .22)