This Peterson 18-tooth HTD spline-drive pulley is specified at 18 teeth and 1.00" width. The billet-aluminum construction noted in the product description provides a durable spline-drive pulley for HTD belt systems, and the one-inch face width supports reliable belt seating. It’s intended for spline-drive applications matching the 18-tooth HTD profile.
Peterson Fluid Systems Pulley 18 Tooth HTD Spline Drive