The BULLDOG top wind trailer jack crank knob is designed for use with tow wind series 150, 160, and 170 trailer jacks. It is a genuine BULLDOG replacement part. Features: Genuine Bulldog replacement part Ergonomic design For 150,160 and Topwind 170 series 2000-5000 lbs. Clamshell package Includes mount cap and washer Color: Red