A-M47766-AI SUB TO A78KOne New Aftermarket SUB TO A78K The Made With Kevlar Blue V Belt is an extra heavy duty belt constructed of organic polyamide fibers. The polyamide fibers are created by a complex chemical process. This process allows the Made With Kevlar belts to have a high resistance to repeated reverse flexing, oil, heat and cracking. Made With Kevlar belts also offer high tensile strength, non extensibility, and high resistance to shock loads. Dim A (1): 1 2" X