... etc.Material:Acetate/Plastic/Titanium/Stainless Steel/Wood/Carbon FiberHinge:Spring hinge, 3 tooth , 5 tooth , 7 tooth, OBE or Comotec ... available,specified hinge supplier etc.Customized Logo:Laser / Engraving ,/Silk Printing /Emboss/ ... CNC machine to cut front and bending for curve,Automatic hinge machine for assembling the hinges, 48 hours for barrel ...