Feature: 1. The product has simple structure, high mechanical strength, high thermal efficiency, safety and reliability, easy installation, and long service life. 2. Wide applicability, widely used in various saltpeter tanks, water tanks, oil tanks, acid‑base tanks, fusible metal melting furnaces, etc. 3. The service life of stainless steel electric heating tubes is very long. Generally, the service life is over 10,000 hours. 4. The water heater is equipped with a silicon sealing gasket, which is elastic and waterproof. 5. With a protective cover, electric pool heater can protect the heating element from direct contact with people or animals. Specification: Item Type: Portable Water Heater Material: Stainless Steel / Brass / Silicone Uses: Widely Used in Various Heating Situations Product Length (Excluding Base Connection Column): 3000w: Approx.220mm / 8.7in 4500w: Approx.240mm / 9.4in 6000w: Approx.270mm / 10.6in 9000w: Approx.320mm / 12.6in 12000w: Approx.350mm / 13.8in. Package List: 1 x Heating Tube1 x Protective Cover Note: 1. The components should be stored away from light. If the insulation resistance drops below 1 megohm due to long‑term storage, it can be dried in an oven at about 200°C for several hours (or the components can be placed under low pressure for several hours) to restore the insulation. Resistance.2. When carbon deposits are found on the surface of the pipe, it must be removed before use to avoid reducing efficiency or even burning components.3. When melting bitumen, paraffin and other solid oils, the voltage should be lowered for use, and then raised to the rated voltage after melting. Prevent power concentration and reduce component service life.