Selecting the right stretcher bar for your masterpiece starts with ensuring only the best, prepared wood is used for each interlocking strip. The Best Medium Duty Stretcher Bar is made from hand-selected white pine that is knot free with no warping. This wood is then milled and kiln-dried to ensure consistency. The strips for the medium duty stretcher bar use are sized at 1 ½” high by 1 ¼” deep. Please take notice the pricing indicated is per strip, not for a pair. Also note these stretchers are custom cut to be used together and with Best Medium Duty Cross-Braces. The importance of a tight fit means that these Best Medium Duty Stretcher Bars will not interlock other brands.