High quality radiator cap with temperature gauge and pressure relief valve Suitable for many different off-road motorcycles and street machines (e.g. Honda CRF, Kawasaki KXF, Suzuki RM-Z or Yamaha YZF). Hot coolant can cause serious injury. The Safe Thermo radiator cap has a thermometer that shows your coolant temperature. You should always exercise extreme caution when handling your cooling system. This radiator cap gives you a quick view of the temperature of the radiator and can help you avoid injury if the cap is too hot and the pressure is too high. - Opening pressure / overpressure protection for the cooling system of 1.8 bar Technical data: Flange diameter (B): approx. 44 mm Connection diameter (A): approx. .