Mobile Filing Cabinet: This is the most common and cost efficient high density shelving systems. Mechanical system incorporates a direct chain drive system transferring the force from the handle directly to the drive shaft, which in turn drives every wheel on one side of each movable carriage. Easy,simple but also convenient. Material:High-Quality Q235 Colded-Coll Steel Feature:Corrosion Protection Color:It can be customized any color. Surface Treatment:Powder Coating Service:OEM ODM Supply Ability:8000 Set/Sets per Month Transportation:By sea Payment term:L/C,T/T,Money gram,Western union,other. Port:Guangzhou,Shen zhen Packaging Details:Knockdown packing by air bubble foam and carton.