Rubber Automotive Transmission Belt 4PK850 rubber V -ribber belt is the combination of the merits of both V belt and flat belt.It got not only the soft and tenacious features of flat belt but also has compact and high efficient merits of V belt. features CR V-Ribbed belt has excellent heat and oil resistant Not only bear to bend ,but also bear the ozone aging better than general unsaturated rubber High transmission efficiency under the operating environment of high-speed rotation ,reverse flexure ,small band pulley Bearing higher horizontal pressure ,incrementing to bear to press function ,decreasing the stress deformation after adding short fiber reinforcement.