... ,NBR,NR FKM, etc 2: Have lots of existed o-ring molds 3: Available in various sizes and colors We are ... ,EVA,etc. PA,TPU,PE,PP,PTFE,POM,PVC,ABS,TPR,PC,PS etc.1,Hardness Shore A (-/+): 40-1002,Working ... accepted.Building a Brand New Future Various Rubber Silicone O-ring,Silicone Sealing ...