Warmflow - Replacement Unvented Water Heater Immersion Element Includes: 14 1-3/4 Boss Incalloy Heating Element Cotherm T115 11 TSE Plug in Thermostat Compatible with: Warmflow Direct Cylinders Warmflow Indirect Cylinders Warmflow Eco Direct Cylinders Warmflow Twin Coil Cylinders Warmflow Triple Coil Cylinder PLEASE NOTE REMOVAL OF THE THERMOSTAT CAP IS STRICKLY FORBIDDEN. TAMPERING WITH THE CAP, OR RETURNING TO US WITHOUT THE SCREWS, WILL INVALIDATE YOUR WARRANTY.