Univen grooved dowel pin. Package of two dowel pins. Compatible with many KitchenAid 4.5 quart and 5 quart Classic, Ultrapower, Heavy Duty, Professional and Artisan models. Compatible with many KitchenAid mixer models such as K45, K5, KSM5, KSM75, KSM95, KSM100, KSM150, KSM152 and 5KPM50. Also compatible with variants of these models which have additional numbers and letters before or after the model number such as 5K45SSPWH0. Compatible with KitchenAid part numbers 4159133, WP4159133, 9705443 and WP9705443. This grooved dowel pin is used to hold the planetary on the center shaft. Measures 0.9" (23mm) x 0.16" (4mm). Quality part by Univen, a family owned American business.