external ø 64 mm - internal ø 37 mm thickness 8.5 mm - 3 fixing holes right turn
Fiorenzato F64E, F64EVO, F83 but also 'whitelabel' Fiorenzato like SanremoSR70 and Ascaso
Sanremo SR50OD, SE64OD, SR70OD, Evo (F64E, Evo