Classical A / Fractional HorsePower (FHP) 4L V-belts, dual brand designed for A section or FHP section applications, 1/2 inch top width, 5/16 inch thick, oil and heat-resistant, static dissipating, built to RMA engineering standard IP-20, length designation denotes outside length, inside length is 2 inches less
Dual brand type A31 / 4L330 , 1/2 inch top width, 5/16 inch thick, 33 inches long