... Neoprene(CR),Styrene(SBR) ,CR,ACM,PU etc.Application: O ring is widely used in different industries: Auto, Machinery, Electronic, Water ... Air-conditioner, Sanitary ware and so on.We have O ring tooling 2000sets in house, our products conform to AS568,Metric ... ) Minimum0.44mm. O ring outer diameter Maximal 530mm2. Color: black, white, yellow, brown, green, blue, transparent, red, natural etc.3. Hardness ...