300PCS Copper Sealing Washer Assortment Kit, Ultimate Red Copper Flat Gasket Set for Commercial Fleet, Marine Vessel & Heavy Industrial Sealing
300PCS ultimate copper sealing washer assortment kit, featuring 12 high-demand sizes for commercial truck fleet brake systems, marine vessel engine overhauls, and heavy industrial hydraulic maintenance. Made from 99.9% pure red copper, these heavy-duty gaskets deliver exceptional ductility, heat resistance, and saltwater corrosion protection, ensuring a tight, leak-proof seal even on extreme-wear surfaces. The industrial-grade, stackable storage box with color-coded compartments keeps sizes organized, making it ideal for fleet managers, marine engineers, and industrial maintenance supervisors.