The Peterson splined Gilmer pulley is a billet aluminum spline-drive pulley with 14 teeth and a 1.020 inch width. Extended product detail lists it as a billet aluminum 14-tooth Gilmer spline pulley at 1.020 inches wide, intended for spline-drive applications requiring that tooth count and width. This pulley is specified for splined Gilmer drive use with the documented dimensions.
Peterson Fluid Systems Pulley 14 Tooth Gilmer Spline Drive