Item Type: Washer Material: Stainless Steel Inner Diameter: Approx. 12mm / 0.47in Outer Diameter: Approx. 15mm / 0.59in Model Length(Approx.) 3515-0015-0020 2mm / 0.08in 3515-0015-0040 4mm / 0.16in 3515-0015-0060 6mm / 0.24in 3515-0015-0080 8mm / 0.31in 3515-0015-0120 12mm / 0.47in 1、Great Washers: You can use the washer to create space between the components on shaft and keep objects moving freely. 2、Practical Use: Can be applied on round shaft with 8mm outer diameter, and on bearing with 12mm inner diameter as well. 3、10Pcs in Pack: Comes with 10pcs uniform washer with 12mm ID and 15mm OD, which adds more convenience to replacement. 4、Good Material: Forged with high quality stainless steel material, has a sturdy structure and durable for long using. 5、Easy to Install: Designed to have a light weight and a compact size, the installation is simple and quick to complete.