GATES MICRO-V AT BELT -- 55.13 in. effective length, 55.694 in. outside circumference, 1.087 in. top width; Designed for small diameter pulleys, backside idlers, and automatic tensioners; Its belt construction effectively eliminates noise, reduces tension loss, and solves problem drives; Features tensile members and rib reinforcement that are added for wear and crack resistance; V-ribbed on both sides; Meets or exceeds SAE J1459 specifications; Replaces belts on serpentine drives and other V-ribbed belt applications.