... are all avilible. better quality, lower price. Material: 5-6 years Moso bamboo. During growth,bamboo culm becomes harder and stronger ... will start to decline after 8 years.When the bamboo is less than 4 years old,lignification is not sufficient,strength is not ... humid swelling are large,so that Moso bamboo above 5 years old should be chosen.Joints: Toogue&Groove or CLICK. And 4 ...