HomeMR12165 Double-ended Nylon Spline Roller MR12165 Double-ended Nylon Spline Roller Double-ended with two nylon spline rollers Spline roller 1: 2″ dia. x 1/8″ wide (for splines .150 to .180) Spline roller 2: 2″ dia. x 3/16″ wide (for splines .220 to .260)