V-Belt Replacement for Atlas Copco 2202925902 The belts exceed USA RMA published ratings levels. They are designed to perform at the identical or higher level than all other major USA Manufacturer's belts of the same Type. Polyester Cord Type Encased in Industrial Grade Rubber. V-Belt Replacement Set for Atlas Copco 2202925902. The lower, compression section of the belt is made of highly fiber reinforced, oil and heat resistant, engineered synthetic rubber compound, specifically compounded for excellent wear resistance, cool running, flexibility and has been proven through thousands of hours of testing. The rubber directly surrounding the tensile member cables is also fiber reinforced and compounded for great adhesion to the tensile member cords. The top fabric is a specially woven, synthetic-natural fiber blend. The notches are engineered to allow the belts to have superior flexibility characteristics on smaller and larger diameter pulleys.