This bullet will fit most common models of piston first stages. Below some examples:
- Scubapro MK2
- Aqualung Calypso
- Mares R2s
- Sherwood Brut
- Cressi AC2
The HP swivel is a tiny part and most of the time it is difficult to put O-rings on the small HP swivel.By using this tools the work gets done in a matter of seconds.
Plastic Tool for o-ring removal