Thermostatic Shower Valve Cartridge - GF3777. Total length including wax thermostat: 92.9mm. - - Total length excluding wax thermostat: 90mm. - - Diameter Temp stop ring splines: 22.5mm. - Diameter of handle splines: 9.5mm (with 24 splines). Diameter of fitting thread: 49.8mm. - - Diameter of top o-ring: 51.5mm - - -Diameter of middle o-ring: 38.6mm - - - Diameter of bottom o-ring: 37.1mm - - - Length of top spindle (from top of stop ring splines): 22mm
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