MaxPower's 12675 includes (1) flat idler pulley for MTD, Cub Cadet & Troy-Bilt. This pulley measures 3/8" ID x 4-7/8" OD & replaces OEM numbers 956-04129, 753-08171, 756-04129, 75604129B, & 75604129C. All MaxPower products are manufactured for peak performance & durability.