Features This screw nut and washer set is made of durable eco-friendly polyamide which has a stable, long-lasting performance and insulation Waterproof fasteners are rust resistant and easy to clean, you can simply clean them with a cloth There are many different available sizes in this set that you can use for different purposes All fasteners are well packed in a plastic box for convenient carry and storage They are great to use in electrical and mechanical hardware as it reduces maintenance over other materials Features:This screw nut and washer set is made of durable eco-friendly polyamide which has a stable, long-lasting performance and insulation.Waterproof fasteners are rust resistant and easy to clean, you can simply clean them with a cloth.There are many different available sizes in this set that you can use for different purposes.All fasteners are well packed in a plastic box for convenient carry and storage.They are great to use in electrical and mechanical hardware as it reduces maintenance over other materials. Specifications:Material: PolyamideType&Quantity:M2 Hex Nut  10pcs M2 Washer  10pcs 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 Screw 23mm 5pcsBox Size: 13*7*3cm/5.11*2.75*1.18" Package Includes:1 Box * Screw Nut Washer Set Package List