Suitable for long-terms outdoor and indoor work. Suitable for maintenance, decorations, furniture production, equipment, craft product We you 500pcs of black washers, and you can choose spacers according to the screw size. 8 common Size, multiple Size to meet needs The washers is selected from nylon with a smooth surfaces, not easily deformable, strong wear resistance and long service life 8 Size of washers is equipped with classification box. The label classification can quickly identify the appropriate size, easy to use, store and carry Black nylon spacer sleeves can reduce frictions, protect part from damage and loose connection between fasteners by increasing surfaces of screws, nut and other part and thus provide protections, Manufacturer: QFMHZP