CE Smith Trailer 10403G Galvanized Roller Bracket Assembly, 8" Use with 8 inch roller (Smith P/n 29502) Mount using 1/2" or 7/16" fasteners (not included) Mounting slots are on 6 inch centers 5/8" diameter x 8-7/8" roller shaft (Smith P/n 10725a) Panel bracket is Smith P/n 10303g40