10PCS/Pack 2mm Thickness M4 5 6 7 8 10 12 14 15 16 17 18 20 21 22 24 25 26mm Copper Washer Solid Gasket Sump Plug Oil Seal

High-concerned chemical : None Standard or Nonstandard : Standard Model Number : M4-20 Material : Copper Origin : Mainland China Shape : Flat Gasket Certification : NONE