Designed to support the Space Saver stencil. there is no backstop bar available for this size shelf. the standard 22" backstop bar will not fit this design. Bliss Stencil Frame Carts safely store your expensive stencil frames. These carts are constructed of welded steel, an important advantage over plywood racks that can generate sawdust and debris, clogging apertures and creating defects in final assemblies. Available in a choice of configurations, these carts can accommodate most frame sizes. Five different channel widths are available to hold stencils of various thicknesses. Shelf height is fully adjustable. Optional backstop bars provide a stop for the frames to keep them neatly aligned. Stencils slide easily on a smooth solid surface. Enclosed configurations available. Carts available with adjustable leveling feet for fixed storage.