O-Ring IKA SY O-ring 100, FEP-coated O-Ring for the EasySyn reactor system. Suitable for reactor vessels with volumes of 100 ml (SY 100 and SY 100 D), 250 ml (SY 250 and SY 250 D), 500 ml (SY 500 and SY 500 D) and 1000 ml (SY 1000 and SY 1000 D)