Timken has designed this belt for the toughest, heavy-duty industrial applications - the kind that devour ordinary wrapped belts. The Super II® puts an end to the constant, costly problem of replacing or re-tensioning belts. Our secret: Super II v-belt's unique construction. Don't take our word for it! Compare Super II to the belt you are now using on your heavy torque, high horsepower and extreme shock-load applications. Timken Belts Super II® V-Belt, Heavy Duty, B Section, 21/32 in Top Width, 7/16 in Thickness, Fabric Cover/Rubber Body/Polyester Cord