1, 30*30*1.2MM rectangular tube frame with special plastic corner connector. it is very convenient to assembly. 2.Curved slats:(54MM wide *9MM thick) in multilayer poplar wood or birch are insrted into the plastic cover. 3.Dimension allowed: single(80-110MM Width,1900-2200MM length) Double:(1200-1800MM Width,1900-2200MM length) 4,Load quantity: 600 Pieces in 1*20ft container,1500pieces in 1*40H'Q.