Used Scubapro MK2 EVO/R105The MK2 EVO R105 is a reliable regulator system suitable for rental, diving schools, or as a backup breathing system for divers. It provides consistent air delivery and has a durable construction. The R105 is paired with SCUBAPRO's MK2 EVO, a piston style first stage with components designed to prevent freezing in cold water conditions. Features MK2 EVO classic downstream piston design Patented XTIS Extended Thermal Insulating System Oversized piston