Insulating washer made of pressboard for M3 screw - 10 pcs Technical data outer diameter: 8mm inner diameter: 3mm thickness: 1mm material: pressboard https://elecena.pl/product/22620330/10-pcs-m3x8x1mm-insulating-pressboard-washer-red 2023-02-22 https://elecena.pl/product/22620330/10-pcs-m3x8x1mm-insulating-pressboard-washer-red 2025-10-29