Features: The strecher bars are made of pine, non-toxic and odorless, it is safe and reliable, maintains its wood color and its original pine scent after manual treatment. please assemble them softly. Please allow tiny size deviations due to human measurement, the frame will be divided into 4 strips when ready to ship, just need a few of minutes to complete assembly. Specifications: Material: Pine Wood Color: Wood Color Frame Size(approx.): 45x55cm/18x22 inch Package Included: 1 x Canvas Frame(4 Stretcher Bars) 1 x Tools Kit Warm Notes: Please ensure the quantities are correct, there are 2pcs of 45cm and 2pcs of 55cm. Due to human measurement, please allow tiny size deviations, if you feel the slots are little small, I suggest that you try to use a little bit of force or use a knife to cut away some wood chips to make it connect successfully, then shake up and down softly.