These spare o-rings goes between the gas bottle and the sodastream adapter.
It is a soft rubber o-ring and allows you to hand-tighten the bottle into the adapter.
- It is the same as the seal that comes in the adjustable pin adapter (right in picture).
- It replaces the pressed fibre seal (green) that comes in the fixed pin adapter (left in picture).
- Does not include either of the brass adapters, it is for the replacement o-ring only