A 42” BEST lightweight stretcher bar made from sustainable white pine. White pine is an ecologically friendly wood choice because it is fast growing, and because it is plentiful in small strips it drives down the cost of these stretcher bars. However in spite of the price, these are very durable and excellent for your smaller or lighter canvases. They are durable and will last for several years with maintenance and cross braces. A great choice for art instruction, the classroom setting, for new artists and veteran artists alike. They are cut 1/8” shorter than the measurement shown in order to accommodate a picture frame.