These insulating screw washers for use on motherboards, PCB's and circuit boards. The screw washers are made of fiber material. Gray fiber washers for your machine builders out there. Product dimensions: 1.2" Width x 1.2" Depth x 0.04" Height Product weight: 0.04 lb Round Shape Fiber Material Size: 32" Color: Gray Usage Tips: - Additional info: - GR-FBW-32-GRAY #03301