The first-stage piston o-ring tool helps with the installation of the small O-ring on first-stage pistons.
 
The first-stage piston o-ring tool fits many of the most common piston first stages. By placing the tool with the opening on the piston top, the o-ring to be installed is easy to place on the piston without any damage.
 
The first-stage piston o-ring tool is precision machined from brass
 
This bullet will fit the most common models of piston first stages. Below are some examples:
Scubapro MK2
Aqualung Calypso
Mares R2s
Sherwood Brut
Cressi AC2
And more......
 
GTIN: 8720828266540