... 2.Thermal stability 3.Non-stick,Low toxicity 4*8mm silicone tube transparentMain features:1.Non-toxic, odorless, transparency, not yellowing ... and excellent electrical properties.Main purpose1.Medical equipment connect piping, catheter etc,2.Baby bottles straws, etc; the catheter3.Electrical equipment ... rated voltage,4000V:~10000V,3, hardness,45~80degree4Elongation:500~700% silicone rubber tube