One of the range of quality dashboard instruments which we offer. water temperature gauge, calibrated 30 to 110 degree centigrade. chrome rim (57mm diameter overall) with white figures on black background dial. hole in dashboard 52mm. capillary 2000mm long. capillary sensor bulb 30mm long, 11mm diameter, with fixing nut-union (3/8" BSP), side illumination slots, supplied with retaining saddle.