HP-A53

A Section Classical V-Belts (1/2-inch Top Width, 11/32-inch Thick) Dual Brand, 53" Inside Length, 55" Outside Length

Classical belts are built to RMA engineering standard IP 20 and are dual branded with classical multiple size and FHP size. FHP designation denotes outside length.
Classical designation denotes inside length.
No need to stock both types when you use Jason UniMatch Dual Branded sizes.
Inside length plus 2 inches equals outside length.