We also can supply OEM service for you.Our main products are solar system, solar energy, solar power,such as non-pressure solar water heater,pressure solar water heater ,and so on.Inner tank3042B stainless steel Outer tank0.4mmInsulationPUF 55mmInner cover3042Bstainless steel Outer covergalvanized plastic-spraying Sealing ringssilicon rubber Φ47 Φ58Anti-dust sealsilicon rubber Φ47 Φ58Tube quantity15 18 20 24 30 36 Tube materialAL-N-AL vacuum tubeTube typeΦ47×1500mm Φ58×1800mmFrame materialstainless 1.2mmFrame colorsilver