silicone o-rings 1. ISO9001/RoHS 2.working.temperature:-40c~+120c 3.material: Epdm,Nbr,Silicone,Fkm,etc. 4.AS568 in Shore A silicone o-rings:O-Ring is used as static and dynamic seals for a wide range of fluids.More 4,000 sets standard size O-Ring tool.Maximum O-Ring size on ID up to 1200mm. minimum size on CS 0.25 mm.Tolerance meet ISO3302-1:1996 M1 High precisionAvailable material: NBR, EPDM, ...