AP Diving OCB Major Service Kit

RB110B - OCB Mouthpiece Major Service Kit 

Includes: Location Screw and O-Ring, 5 x mouthpiece O-Rings and Mouthpiece Non-return Valves.

For O-Rings only, see RB110A OCB Minor Service Kit, available on this site.

Does not include Dual Valve O-Rings or parts. See RB110C Dual Valve Minor Service Kit and RB110D Dual Valve Major Service kit, available on this site.