Features: This screw nut and washer set is made of durable, eco-friendly polyamide material, offering stable, long-lasting performance and excellent insulation properties. The waterproof fasteners are rust resistant and easy to clean—simply wipe with a cloth. This set includes multiple sizes for versatile use across various applications. All components are neatly organized in a durable plastic storage box for easy transport and convenient storage. Ideal for use in electrical and mechanical hardware applications, these fasteners require less maintenance compared to other materials. Specifications: Material: Polyamide Type & Quantity: M2 Hex Nut – 10 pcs M2 Washer – 10 pcs M2x4mm Screw – 5 pcs M2x12mm Screw – 5 pcs M2.5 Hex Nut – 10 pcs M2.5 Washer – 10 pcs M2.5x6mm Screw – 5 pcs M2.5x12mm Screw – 5 pcs M3 Hex Nut – 10 pcs M3 Washer – 10 pcs M3x6mm Screw – 5 pcs M3x12mm Screw – 5 pcs M4 Hex Nut – 10 pcs M4 Washer – 10 pcs M4x8mm Screw – 5 pcs M4x15mm Screw – 5 pcs M5 Hex Nut – 10 pcs M5 Washer – 10 pcs M5x10mm Screw – 5 pcs M5x20mm Screw – 5 pcs Box Dimensions: 13 x 7 x 3 cm (5.11 x 2.75 x 1.18 inches) Package Includes: 1 x Screw, Nut, and Washer Set (in storage box)