These are M8 Clearance Inside Diameter washers with a 20mm Outside Diameter and have been anodised red. These are manufactured in-house from 6082 Aluminium using state-of-the-art CNC machines and are manufactured from aluminium solid round bar and not from aluminium tubing. They are bar turned from solid bar with a chamfer on the O\/D and I\/D on both ends. Unless the item is deemed faulty, this item is non-returnable and non-refundable. M8 x 20mm O/D Flat Washers - 6082 Aluminium Anodised Red