JKF America's Top Drive Double-Sided Poly V-Belts are designed to international standards, including BS3790, JIS, RMA, and DIN. Meant for serpentine applications, the V-Belts have twin contact surface ares for power transmission through both sides of the belt. It is also highly flexible for reduced bending stress and can handle a temperature range of -40 degrees F and up to 248 degrees F. The belts have a range of 22-125" and can be used for fans, alternators, AC compressor water pumps, and power steering drive.