O-Rings Several material can choose on your requirement: NBR, SR, CR, PTFE etc. Welcome to www.jbdrubber.comPrime Feature > ... material can choose on your requirement: NBR, SR, CR, PTFE etc.> Many types of o-rings: O type, E type, U type, V ... pump, valves, furniture, toys, pipes, etc. We also supply the o-ring rope. Welcome to contact with us. High Quality O-Ring