Some Scubapro first stages use a bushing arrangement to help the movement of the piston during diving.Installing these bushing rings and the small O-ringin-between them is made easy when you use this bushing tool.
Internal O-ring tool set for Scubapro MK5, MK6, MK10
Used to insert O-ring into the main body of a Scubapro MK10 first stage. With this tools the job is done in a matter of seconds. Place 2 of the parts of this tool set on the top and bottom of the first stage body and push the O-ring into its place with the small rod of the tool set.