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 screw washers are for use on motherboards, PCBs and PCBs. Screw washers are made of fiber material. Red fiber washers for your machine builders. Washers outer diameter: 8 mm Fiber screw washers, inner diameter: 3 mm Weight: 80 g Color: red Package content: 2000 screw washers for motherboard boards. Only the above package content, other products are not included. Note: Light reflection 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.