Immersion Heater Lower with TSR - 95606963 Immersion Heater Upper with TSR - 95606964 Immersion Heater Spanner - 95607861 Immersion Heater BackNut - 95607869 Alternative Heatrae Sadia Megaflo components Upper and Lower Immersion Heaters both come complete with: - Immersion Heater Spanner - Immersion Heater Back Nut - TSR Thermostat - Gasket Compatible with: Heatrae Sadia Amptec Electromax Combination Cylinders and Boilers Heatrae Sadia MegaFlo Eco SolaReady Unvented Solar Cylinders Heatrae Sadia Megaflo Eco Systemfit Unvented Cylinders Heatrae Sadia MegaFlo Eco SystemReady Unvented Cylinders Heatrae Sadia MegaFlo Eco Unvented Cylinders Heatrae Sadia MegaFlo HE Unvented Cylinders Heatrae Sadia MegaFlo Unvented Cylinders Heatrae Sadia MegaTech Solar Cylinders Heatrae Sadia MegaLife Cylinders Santon Premier Plus (MK1 Control) Cylinders Santon PremierPlus Solar Cylinders PLEASE NOTE REMOVAL OF THE THERMOSTAT CAP IS STRICTLY FORBIDDEN. TAMPERING WITH THE CAP OR RETURNING TO US WITHOUT THE