Main Rubbers
NR - Natural Rubber.
IR - Polyisoprene.
SBR - Butadiene-Styrene.
BR - Cispolybutadiene Synthetic Rubber.
IIR - Butyl.
EPDM - Ethylene-Propylene Diene Monomer.
NBR - Nitrile Butadiene Rubber.
CM - Hypalon Chlor Sulfonated Methylene.
CR - Chloroprene.
MQ - Silicone.
FKM - Viton.