Shanghai Airgun Fatory/Industry Brand QB78/78D, AR2078, AR2078A .177 and .22 caliber Seal Kit:

Included in this kit are 9 seals as follows:

3 x Barrel O-Ring (Medium Size, Black)
2 x Breech Seal (aftermarket seal, only 1 required for gun reseal)
1 x Valve O-Ring (Black)
1 x Co2 Cap O-ring (White)
2 x Bolt O-Ring (Small, Black, one for .177 cal, other for .22 cal)