Genuine Rada Mira 1663.152 thermostatic cartridge. Included: - 1663.152 thermostatic cartridge (TMV3 standard)This cartridge is suitable for:Mira Miniduo / Minilite - Built-in Shower ValvesMira Tabla Thermostatic MixersMira Miniduo / Minilite / Moto / Pace - Exposed ValvesMira Bijou Shower Mixer ValvesMira Ordo Thermostatic MixersRada V10 MixersMira 1663.152 Cartridge Technical Specifications:Total Length: 102mmWidth at widest point: 43.5mm (at the brass thread)Material: Plastic and brass (black, blue, red, brass and white temperature sindle / spline)Installation Type: Screw fitNumber of O-Rings: 3 (2 are black and 1 is blue). Temperature regulating Technology: Thermostat wax element made by Vernet France. Reasons why you may have to replace your Mira 1663.152 thermostatic cartridge:1. No consistent temperature coming from shower.2. Water temperature too hot.3. Water temperature too cold.4. Water leaking from around thermostatic cartridge