... . Application:cars,Bath,Gate,Hydropneumatic,Electronics,Powertools,Fire ,extinguishers ,Refrigeration Compressor in air conditioning, etc.3. Main products: O-Ring.X ... . Colour: red ,white,black ,blue ,yellow,green ,brown ,etc.7. Standard:AS568,DIN3771,JIS B2401,ISO3601,BS1806.8. accept sample or ... requirement ,but o-ring's mold fee is free. KTW standard rubber seal