Therafin’s Theraslide Transfer Boards offer a smooth transition from wheelchair to chair. They are made from a 10-ply birch base with 1 additional ply laminated on top; 1/2" thick in the center section tapered to 1/4" at each end; finished with a walnut stain and three clear seal coats. See the details tab for additional features of the board. Stress tested to hold up to 450 pounds.