This nut and washer set is made of durable and eco-friendly polyamide with the durable and stable performance and good insulation The waterproof fasteners have rust resistance and are easy to clean There are different sizes available in this set that you can use for different purposes They are perfect to use in electrical and mechanical equipment as they reduce maintenance compared to other materials All fasteners are well packed in plastic box for convenient transport and storage Features: Material: Polyamide Type and quantity: M2 Hex Nut 10 pcs M2 Washer 10 pcs M2x4mm Screw 5mm 5pcs M2x12mm Screw 14mm 5pcs M2.5 Hex Nut 10pcs M2.5 Washer 10pcs M2.5x6mm Screw 8mm 5pcs M2 .5x12mm Screw 14mm 5pcs M3 Hex Nut 10pcs M3 Washer 10pcs M3x6mm Screw 8mm 5pcs M3x12mm Screw 14mm 5pcs M4 Hex Nut 10pcs M4 Washer 10pcs M4x8mm Screw 10mm 5pcs M4x15mm Screw 18mm 5pcs M5 Hex Nut 10pcs M5 Washer 10pcs M5x10mm Screw 13mm 5pcs M5x20mm 23mm screw 5pcs Box size: 13 * 7 * 3cm / 5.11 * 2.75 * 1.18 \\ Package includes: 1 box * Set of nut washers