The Peterson splined Gilmer pulley is a billet aluminum spline-drive pulley with 18 teeth and a 1.020 inch width. Extended product text describes a billet aluminum 18-tooth Gilmer spline pulley at 1.020 inches wide, presented for spline-drive use where that tooth count and width are required. This pulley carries the stated dimensional and construction details for splined applications.
Peterson Fluid Systems Pulley 18 Tooth Gilmer Spline Drive