This 17” BEST lightweight stretcher bar is a great option for artists in training who are producing smaller works of art. They are produced from white pine which is a durable. Cut 1/8” shorter than the listed size so they can fit inside of picture frames because stretching the canvas adds more width. A great option for artists in training, instructors, classroom training, and students. Not intended for use on larger sized canvases. Pine is a sustainable fast growing wood, and because of how plentiful it is these stretcher bars are available at a low cost. Easy to work with and durable, these stretcher bars offer excellent support for the price.