... :1. A=Excellent, B=Good, C=Fair, D=Poor 2. We are not limited to the four common elastomers mentioned above but can ... (CR), high/low temperature nitriles, conductive rubbers, carboxalated rubber etc. We have a state of the art laboratory and can modiy ... in many to include temperature, abrasion, high rpm, durometer etc.We guarantee our product quality as follows1) The queen of quality2 ...