1、Good electrical conductivity and thermal conductivity. 2、395pcs 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. 395pcs 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: 18 Quantity: 395PCs Box size: Approx. 28.5 x 13 x 3cm / 11.22 x 5.17 x 1.18inch Weight: 580g 395PCS Copper Washers Model: Size Quality  5x8x1mm 50Pcs 6x10x1mm 30pcs 8x14x1mm 30pcs 10x16x1mm 20pcs 12x18x1mm 20pcs 13x18x1mm 20pcs 13x19x 1.5mm 20pcs 14x18x1mm 20pcs 14x20x1mm 20pcs 16x20x1mm 20pcs  16x22x1mm 20pcs 17x23x 1.5mm 15pcs 18x24x1mm 15pcs 20x27x1mm 15pcs 22x30x 1.5mm 10pcs 24x30x 1.5mm 10pcs  26x33x 1.5mm 10pcs Package Included: 1 x Box of 395pcs Copper Washers