1、Good electrical conductivity and thermal conductivity. 2、80pcs solid copper sump plug washer set for multiple choices. 3、All contained in a compact and see through compartmented plastic case. 4、Great for sump plugs, water, fuel and hydraulic fittings. 5、A sump plug washer set to suit all types of engines be it Car, Marine, Generators, Machinery and Plant. Features: Good electrical conductivity and thermal conductivity. 80pcs solid copper sump plug washer set for multiple choices. All contained in a compact and see through compartmented plastic case. Great for sump plugs, water, fuel and hydraulic fittings. A sump plug washer set to suit all types of engines be it Car, Marine, Generators, Machinery and Plant. Specifications: Material: Copper Size types: 8 Quantity: 80PCs Box size: Approx. 12.8 x 7 x 2.2cm / 5.03 x 2.75 x 0.86inch Weight: 150g 80Pcs Solid Copper Washers List: Size: (I/D x O/D x Thickness) Quantity M20*26* 1.5   5pcs M18*24* 1.5    5pcs M16*22* 1.5    10pcs M14*20* 1.5    10pcs M12*18* 1.5    10pcs M10*16*1       10pcs M8*14*1        15pcs M6*12*1        15pcs Package Included: 1 x Pack of 80pcs Copper Washers 1 x Case