20 PCS 18mm Inner Dia Copper Crush Washers Flat Sealing Gaskets Rings Parts by | Jul 22, 2026Size:18×24.5x1mm/0.71″x0.96″x0.04″(Inner Dia Outer Dia Thickness). Copper used washers feature abrasion,temperaure and pressure resistancy. Have a tighter seal and high heat resistance than steel and rubber washers.
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