... , PU etc.Item nameO ringMaterialNBR,HNBR,EPDM,SILICONE,VITON,NR,CR,SBR,PUHardness30-100 shore ASizeCustomized ... -20~100degree centigrade;NBR(-40~120°C),SILICONE(-30~250°C),VITON(-25~300°C)Special ... the non-standard model7.) model is complete, the stock inventory 8.) the mature technology, stable quality9.) Green environmental protection10.) meet the demand of sustainable development glow in the dark ...