[Features] ● A roller conveyor with excellent water resistance and corrosion resistance that combines resin rollers and an aluminum frame. ●A roller conveyor with excellent water resistance and corrosion resistance that combines resin rollers and an aluminum frame. ●Suitable for transportation that requires more strength than MR30. ●Bearing balls are made of stainless steel. ● The shaft is made of aluminum. ●Bolts, nuts, joint fittings, and frame binding materials are made of steel.