You are bidding for 2 pairs of rebuild kits for fat cylinders.  The kit includes the following:

Eight (8) pieces of high-density black O rings, applicable to 1-5/8" cast diameter cylinders, 2 O rings for each cylinder,

Eight (8) pieces of Teflon split O rings, applicable to 1-5/8" cast diameter cylinders, 2 split O rings for each cylinder. 

Any return of products is subject to pre-approval and a restocking fee maybe charged.