Ashland guard pair 30224 – galvanized steel 90 degree curve 16 bf 36 inside radius gu390 guards may be used with ashland skatewheel and roller conveyors. The guards are constructed from 2-1/2 x 1 x 12 ga. Galvanized steel channel. Includes 2 90 degree curves and attaching hardware. The guards bolt to the top flange of the conveyor frame. For 36 inside radius, 16 bf conveyor systems