This product is a box of 100 black rubber washers with a thickness ranging from 2mm to 6mm. The washers have a hole size of 5mm to 6mm and an outer diameter ranging from 20mm to 28mm. Made from high-quality rubber, these washers are metric in size and come in a pack of 100. Ideal for various fastening and hardware applications, this product offers a reliable solution for sealing and securing components in industrial settings.