Replace OEM:

Toro: 100-3976, 99-3877

Fit Models:

Toro: Z master 100 series, Z149, Z150 and Z153 with 52" SFS side discharge decks

Notes:

Cast iron assembly with greas zerk

Pulley Outer Diameter  6 3/4"

Blade Saddle Width 2 9/16"

Height: 6 9/16"