This v belt pulley allows you to add a motor to the Chop-Rite Two manual meat grinders. These grinders are formally known as the Enterprise brand. The wheel diameter is 12 in. The center shaft hole sizes are; for #10/12 grinders 3/4 in. diameter, for #22 grinders, 7/8 in. diameter, and for the #32 grinder, 1 in. diameter. Please indicate which size grinder you need the pulley for in the comments section of your order. The pulleys are made of cast aluminum. Chop-Rite recommends a 1/3 hp, 1700 rpm motor. pulleys are made in the USA. 4 lbs.