... , etc. 4. Certification:ISO9002:2009, TS16949 ,NSF ,ACS .WRC ,FDA ,UL ,KTW,W270, ROHS, SGS .5. Packing: neutral or as per ... . 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