Completely stainless steel material (SS316) used for rust free longer time High quality three target vacuum tubes for better effeciency Polyrethane foaming isulation (60MM) used to prevent heat loss Electric heating rod with thermostat included for cloudy weather. Number of tubes : 36 Pieces Capacity :450 Ltr Manufacturing Guarantee and Warranty : 5 Years Delivery & Manitenance : FREE (Only Inside Kathmandu Valley) Additional drain outlet for tank cleaning Installation charge included Completely stainless steel material used for rust free longer time.Best quality stainless steel corrison resistant SS316 used foe inner tank. High quality three target vacuum tubes for better effeciency.Polyrethane foaming isulation used to prevent heat loss. Electric heating rod with thermostat included for cloudy weather. Additional drain outlet for tank cleaning. Brand NEO Appliances SKU 100970115_NP-1021506626 Model 450 LTR