Ashland 5' Straight Roller Conveyor 11F05EG45B10 10" BF 3/8" Roller Dia. 1/2" Axle Centers 3/8" x 18 gauge galvanized steel rollers set high in frame, and hook rod couplings. Gravity roller conveyor will convey light and medium duty loads that have firm flat bottoms such as cartons, totes, skids, and drums.