... rollerThey are classified in natural rubber (NR), nitrile butadiene rubber (NBR), chloroprene rubber (CR), ethylene-propylene-diene monomer (EPDM), silicon gel (G), and fluoro ... ).They are classified in natural rubber (NR), nitrile butadiene rubber (NBR), chloroprene rubber (CR), ethylene-propylene-diene monomer (EPDM), silicon gel (G), and fluoro ...