[Premium Material] The plumbing washers and seals are made of red steel paper fiber material, offering wear resistance, corrosion resistance, heat resistance, good insulation properties, and long-lasting durability. [Easy to Use] The flat outside tap washer provides excellent insulation performance, helps distribute load evenly, prevents surface damage, and insulates steel screws effectively. [Convenient Storage] Includes a clear compartmented plastic storage case. All fiber washers are organized in the plastic box for easy access and convenient storage. [Wide Applications] These fiber washers are suitable for various plumbing, electrical appliances, and electronics industry applications, used as buffers or packers. [What You Will Receive] You will receive 600 pcs of red steel paper fiber washers in 12 different sizes, meeting diverse needs and providing ample supply for daily use. Color: Red Material: Red steel fiber Package Contents: 160 x 10x5.5x0.8mm 100 x 12x6.5x0.8mm 60 x 16x8x0.8mm 80 x 16x10x0.8mm 40 x 19x12x0.8mm 40 x 20x12x0.8mm 20 x 22.5x14x0.8mm 30 x 22x16x0.8mm 15 x 25.4x17.5x0.8mm 20 x 27x20x0.8mm 20 x 32x22x0.8mm 15 x 32x24x0.8mm 1 x Plastic box (20.5 x 10.5 x 3 cm) Note: The package includes only the items listed above. Other items are not included. Lighting and monitor settings may cause slight color variations between the image and the actual item. Measurement tolerances allow for +/- 1-3 cm differences.