"Material Mild steel , in China we usually use Q235, which similar to grade 250(AUS), A283(USA). we can also use Q345 which similar to grade 350 (AUS), A210(USA).This gives you amazing value through greatly increased product life. Size It can range in size from 6CBM to 40 CBM. Thickness of plates used 3mm mild steel plate for sides and 4mm mild steel for floor. Thicker plates are available to your requirements Specifications 1) RHS or PFC is used for top rails, and top edge of plate is continuously welded to it 2) Fully welded inside and outside 3) Hook bar: Dia 50mm 4) Bottom chassis : PFC 200*75 PFC 5) Curved sides 6) Hinge and rollers with grease nipples Options 1) double opening door 2) Up opening door 3) HDG (Hot dipped galvanizing) 4) Crane eyes on top 5) Ladders in front or in the back Painting we will paint each bin you order in your company colors enhancing your company image with great looking bins. twice of primer +twice of top coat Primer : zinc-based epoxy (Grey) Top coat : Urethane(Any color) http://www.binsupplier.com "