... are professional silicone rubber o-rings,gaskets/seals manufacturer in shanghai,china.in this field,we have the long history, mature ... ,samples,etc.Features:1.various material are available:made in high grade silicon material,EPDM,CR,NR,NBR,SBR, ... strong functions3.excellent resistance to ozon,oxygen,mineral,oil,synthetic hydraulic fluid,fuels,solvents&chemicals.4.certification: confirm to the ISO9001- ...