Product Name : Screw Fiber Washers These Insulating Scrw Washers for use on motherboards, PCB's and circuit boards. The screw washers are made of fiber material. Washers outside diameter: 8mm Screw Fiber Washers inside diameter: 3mm These Insulating Scrw Washers for use on motherboards, PCB's and circuit boards. The screw washers are made of fiber material. Red Fiber Washers for your machine builders out there. Washers outside diameter: 8mm Screw Fiber Washers inside diameter: 3mm Weight: 4g/Pcs color: red Package Content: 300 x Motherboard Screw Washers. Only the above package content, other products are not included. Note: Light shooting and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.