C. E. Smith Shipshape 29310 Trailer wobble ribbed roller kit for 3/4 " or 1 1/8" shafts. Kit includes four 5" X 3" yellow TRP ribbed rollers with 1 1/8" polypropylene hubs, four Delrin bushings to fit 3/4" shafts, four 1 1/8" washers, four 3/4" washers, and four retainer rings. Washers and rings are zinc plated. Made in the USA.