Material and performance: Copper sump plug washer set with a melting point of 1083 C. Provides good electrical conductivity and thermal conductivity. Complete set: 280 pieces of solid copper sump plug washers, organized in a compact seethrough compartmented plastic case for easy selection and storage. Core applications: Ideal for sump plugs, water, fuel and hydraulic fittings. A sump plug washer set designed to suit all engine types, including Car, Marine, Generators, Machinery and Plant. Specifications Material: Copper Color: as picture shows Box size: approx 130 x 68 x 22 mm Size types: 12 280 piece configuration (Marked quantities refer to each size) M5*9*1: 30 pcs M6*10*1: 30 pcs M6*12*1: 20 pcs M8*12*1: 20 pcs M8*14*1: 20 pcs M10*14*1: 20 pcs M12*16*1: 20 pcs M12*18*1.5: 20 pcs M14*18*1: 20 pcs M12*18*1.5: 20 pcs M16*20*1.5: 20 pcs M16*22*1.5: 15 pcs M20*26*1.5: 15 pcs 200 piece subset (Size details given as I/D x O/D x Depth) M5*9*1: 30 pcs M6*10*1: 30 pcs M6*12*1: 20 pcs M8*12*1: 20 pcs M8*14*1: 20 pcs M10*14*1: 20 pcs M12*16*1: 20 pcs M12*18*1.5: 20 pcs M14*18*1: 20 pcs Use scenarios Replacing sump plug washers on car engine oil pans during routine maintenance or oil changes. Servicing marine engines or generators where reliable copper washers are needed for water, fuel or hydraulic fittings. Maintaining hydraulic equipment or plant machinery that requires a durable copper washer for a proper seal and long service life.