**Due to the size of this product there may be additional shipping charges!** Heavy Duty Stretcher Bars are made of strong, kiln-dried, knot-free pine sourced from Forestry Stewardship Council (FSC) certified suppliers. The stretcher bars have a 1-1/2" profile and are 2" wide. Each bar's profile has a slightly rounded edge with a 1/2" rise. This prevents sagging and helps eliminate ghost impressions on your final stretched canvas.