Pulley 4-3/4" Dia & 3-1/4" x 1" ID #38-37 Murray as P/N 1401066

Pulley 4-3/4" Dia & 3-1/4" Dia. #38-37 The Dual Pulley is Used by Murray as P/N 1401066. 

The 4-3/4" Dia. pulley is made for a 5/8" V belt, the smaller 3-1/4" pulley is made for a 1/2" V belt, hub size is 1" ID x 5-1/8". 

Overall End to End is 5-1/8" long & 2-11/16" between pulleys.