Smith Panel Bracket for Roller. SAVE NOW! Top quality accessories at big savings. 1-Pc. heavy duty keel roller brackets provide added roller support and help eliminate vertical movement of the bracket. Here"s more: For 4" roller: height is 5 3/4"; slot 9/16" x 2 5/8"; 3" between slots; For 5" roller: height is 6 3/4"; slot 9/16" x 4 5/8"; 3" between slots; For 8" roller: height is 6"; slot 9/16" x 3"; 3" between slots; For 10" roller: height is 8"; slot 9/16" x 5"; 8 3/16" between slots ; For 12" roller: height is 8"; slot 9/16" x 5"; 8 3/16" between slots; State Size. Order Today! Smith Panel Bracket for Roller