Bore Size: 1 inch
Keyway: 1/4 inch
Number of Teeth: 14T
Compatible Chain Size: #40/41/420
Horse Power: Up to 13 HP
Engagement Speed: 3300±100 RPM
Clutch Outer Diameter: 4.74 inch
Two Set Screws are included in the bag, please open the bag with caution, it may drop out