MKP-34 - 3/8" Metal nut and washer for 4" new 'WW' serial numbers. Easy-to-use kit that allows for fast removal/replacement of prop. Available in three different sizes to fit Minn Kota prop dimensions (3/8", 1/2" and 5/16"). Includes prop nut and washer. Requires a crescent wrench for installation. May not be exactly as illustrated.