... )Good thermal resistance 3)Outstanding abrasion resistance 4)Offer OEM Rubber Grommet Material- We use various kind of polymers like NBR ... of drilled or punched holes for wiring, cable, tubing, piping, hoses, air lines, rope and more. Used in appliances, motors, tools ... sizes and structure availableHardness: 30 to 80 Shore A Durometer Rubber Grommet