[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 damage to surfaces, and insulates steel screws. [Convenient Storage] Comes with 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, serving as buffers or packers. [What You Will Receive] You will receive 600 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. Note: Lighting and display differences may cause slight variations in color. Measurement tolerance is +/- 1-3 cm.