Material Paper Gasket Type O-Ring Inner Diameter Tolerance 5 Millimeters Item Weight 113 Grams Number of Pieces 150 About this item 100% brand new and high quality. Made of premium material, these washers have good insulation performance. There are many different sizes in this set that can meet your various needs. Each set contains many washers that can be used for a long time, so you don't need to run around looking for your washers for a long time. All washers are well packed in a plastic box for convenient storage.