1.High quality,high precision,reasonable price. 2.Delivery in time. 3.Good service before and after the order. 4.Neutral packing or according to you requirements. 5.Size:all sizes, can produce as your samples and drawing. 6.The copper washer is made of excellent red copper sheet, it has good jointing and sealing performance. 7.Working temperature:up to 800 celsius degree. 8.The product has many sizes.It applied on macheries and cars.Its material has copper,aluminium,stainless steel and so on.