Features - Equipped with excellent vacuum tubes. - Stainless steel SUS 304-2B inner cylinder, real drinking water quality . - Outer tank material: Stainless steel plate or powder coated color steel sheet - The effect of temperature preservation can last 72 hours. - Simple structure, easy to assembly and install. - Highly efficient insulation with high pressure constant temperature and fixed quality integrated polyurethane foaming technology. - High wind and snow resistant performance. - 3-year limited warranty for full system.