Aluminium alloy panel, both sides could be used 13x40 holes on the panel, conducting heat easily Optional accessory: soft silica rubber pad Oxidation & frosting technics, color amendable Suitable for 17' or smaller laptop computer Function: Silica rubber pad Usb fan Usb hub "impeller" shape fan holes Standard color black Exterior technics frosting oxidation Folded size mm 560*285 Panel (l*w) mm 450*285 Tube length mm 300 Tube length pcs 6¨3*2 Weight kg 2.1 Laptop suitable 17or smaller Max weight bearing kg 15 Height range mm 560 Angle range angle 360. Color box size cm 60*34.0*8.3cm Ctn size cm 61.5*35.5*43.0cm Pakcing q'ty pcs/ctn 5 G.W. Kg 13.5 N.W. Kg 11.5 20' pcs 1300 40' pcs 2880