【WITH UL CERTIFICATE】Our water heater element passed UL certificate, which ensures good quality and high security. 【UNIVERSAL WATER HEATER ELEMENT】This high watt density-style heating element is easy to install, it can be used in most replacement situations of the same wattage and voltage, but minimum tank diameter is 15". 【COMPATIBILITY 】Element fits most models of American, AO Smith, Bradford White, Craftmaster, GE, GS Wood (certain models), Kenmore, Lochinvar, Maytag, Mor-Flo, Reliance, Rheem, Richmond, Rudd, Sears, State, Whirlpool, and hot water heaters manufactured after 1994. 【MATERIAL & SPECIAL SURFACE TREATMENT】 Copper heater with nickel coating material, ensure the electric water heater element has better corrosion resistance, good thermal conductivity, fast heating, more environmentally friendly and good-looking appearance. 【NOTE】Minimum tank diameter 15", check specifications and make sure water heat element fit the tank before you order. This replacement element must be the same voltage and wattage as the element being replaced, never exceed the nameplate rating on the appliance. The water heater element is manufatured with high quality and with the UL certificte.