Description: Part Number(OE): 803916010 Fit for Subaru. Ring Size: 21mm Open Size: 16mm Thickness: 2.5mm Screw Size: M16 Material: Metal Color: Sliver Qty: 50pcs Package Includes: 50 x Oil Drain Plug Washers Note: Please allow 0.5-1 inch difference due to manual measurement.(1 inch=2.54cm) Please check the size measurement and the picture carefully before making payment