... , aluminum fin Manifold Copper flow passage, PU insulation, Aluminium alloy shell Water Tank Capacity 100 ~ 500L for storage tank Inner ... Spec.(mm) 1.5 ~ 2.0mm in thickness Material Aluminium alloy plate Accessories Workstation system, Electric heater, E-Parts box, thermostat, ... long lifespan (15 years)2) Tank shell: Color steel plate as exterior shell, much durable and appealing. Stainless steel makes ...