1, rubber o-rings made by NBR EPDM silicon FKM etc. 2, Have lots of existed o-ring molds 3, could produce from client size 1, standard AS568 orings made by NBR EPDM Silicon FKM etc2, have lots of existed molds from cross section 1.78 2.62 3.53 5.33 to 6.993, Have NSF61 cerfaction o-rings4 All manufacturing process confirm to the ISO90015 RoHS directive compliant green products6 Rapid development ...