20Pcs Copper Flat Washer & 2Pcs Flat Bracket MountEssential compatible with Automotive and Small Engine Repairs. Washers made from copper are often used within piping, electronics, household products, and bio applications as copper is malleable and ductile - a biostatic surface that is a good conductor of heat and, when very pure, a good conductor of electricity.Copper Provides a Tighter Seal and Greater Heat Endurance than Steel and Rubber Washers.These obviously have industrial uses, but we also sell them to weavers, artisans who make wall hangings, a lady who uses them to accent macrame hanging baskets etc.Copper Washer:Total Size: 12 x 18 x 1.5mm/0.5 inch x 0.7 inch x 0.06 inch (Inner Dia * OD * T)Material: CopperColor: Copper ToneFlat Bracket Mount:Flat bracket mount suit gas struts, Gas Spring Bracket.Most widely used textile machinery, printing equipment, office equipment, construction machinery, machines equipment, combination joint fittings and other industries, high qulity and long life use.Ball Thread Dia: M6 (Approx 5mm Dia Hole)Ball Joint Size: 15 x 8mm/ 0.6 inch x 0.3 inch (Thread Length * D);Socket Dia.: 16mm/ 0.6 inchOverall Size: 38 x 28 x 16mm/ 1.5 inch x 1.1 inch x 0.6 inch (L * W * T);Material: MetalColor: SilverPackage Content:20 x Copper Washers2 x Flat Bracket MountOnly the above package content, other products are not included.Note: Light shooting and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.