This is a timing belt pulley for a servo.
Timing belt profile: MXL 2.032mm (0.08") with 32 teeth
Servo spline: Futaba25T
Spline version: 66.9° tooth angle / major Ø5.92mm (0,2331") / 25 spline
-the fit due to fabrication tolerances has not been confirmed-
-material frosted ultra detail is recommended for best detail, but may not have fine enough details for the centre spline profile-