I have too much Cave Diving gear left over from cave study projects. This was specifically set up for Sidemount, but also mounts on standard doubles backplate. Lightly used as a backup unit for our team. Has redundant high capacity bladders for added safety. Primary bladder and backup bladder both equipped with power inflator (hoses included). Also includes butt plate for attaching reels, tank attachment etc.
These are pricey units from Dive Rite, and this is a bargain for a cave and/or tech diver at $250 before going to Ebay.
Contact me on forum or with my email link... no pm's as I forget to check for them.