... fatigue. Size:OD9mm,ID:6mm,Thickness:2mm available Name:Silicone Medical SuppliesMaterialsiliconeFeatures:1.It is made of 100%pure food ... grade silicone.2.It features elasticity,durability,transparency,non-poisonousness,anti- ... siliconedesign and production,we are albe to bring out medical silicone rings up to your requirments according to 3D drawings.2. ...