CF - DOME SHAPED FLUID LEVEL INDICATORS GF - STEEL MOUNTING FLANGE -Transparent half ball shaped level indicators, available with 2" and 3" threaded weld-on steel flanges -Made from thermoplastic resin for optimal shock resistance and high strenght ; max operating temperature 70°C -Product is utilized on trucks / tankers and large reservoir containing liquids, especially in agricultural machinery -A 70 shore O-Ring is available on request