I am selling my Halcyon Evolve system for diving doubles. The backplate is Standard size, stainless steel. The wing has 60 lb lift capacity. The backplate has only a couple of dives as I only use my aluminum plate. The wing has about 80 dives, almost all freshwater, and thoroughly rinsed inside and out after each day of diving. The backplate storage pack is brand new and never used. Everything is in perfect working condition.