Material: Kiln dried pineMoisture level: 9-12% finished product.Bending tolerance: 0.040"/ft in the length (not accumulated)Twisting tolerance: 0.020"/ft in the lengthTwists, pockets of glue, holes, cracks, worm holes, knots, superficial cracks, fingerjoint steps and bad finish are all not accepted. Natural wood stains permitted.All pieces must use finger jointAll pieces must use color producing area:CHINA