Usage: Domestic Solar Water Heater Type: Evacuated Tube Collector Capacity (LPD): 250 Ltr Material: Stainless Steel Colour: Stainless Steel Insulation: Polyurethane Tube Material: Blue ray coated glass tube for fast heating No of Tubes/ Fins: 20 Pieces Tube Length (cm): 161 Tube Thickness (mm): 0.16 Guarantee: 5 Years Warranty : 10 Years Maintaince & Delivery : FREE ( Inside of Kathmandu Valley) Dimensions (L*B*H) : 161cm*145cm*168cm