900PC O Ring Kit 1.Material: NBR,FPM,silicone etc 2.Size ... sizes available 3.Hardness:60-90 shore A 900PC O RING ASSORTMENTo ring assortmentrubber o ring kit1) Materials include: Natural Rubber (NR) , Styrene ... -61, WRAS. 5) We can supply many types of O-Ring.(ISO 3601, AS 568A, DIN 3771, JIS B2401.)6) ... , valves, pumps, sanitary, electronics, bearings, electrical appliances etc. 900PC O Ring Kit