ball chain material: brass, iron, stainless steel can be choose surface finishing: nickel, chrome, silver, gloden are available accessory: coupling, fat bead, little bead, basket and ect. size:1.5mm,2.0mm,2.3mm,3.0mm,3.2mm,3.5mm,4.0mm,4.5mm,5.0mm,6.0mm,8.0mm,9.0mm,10.0mm length:any size are available any material,suface plating,specification can be made by requirement. welcome to contact us or visit our website " " for more information.