Lsgoodcare Black M3 Nylon Male Female Hex Spacers Screw Nut Stand-off Plastic Accessories Assortment Kit-160PCS Nylon Hex Spacers/ Screws/ Nuts Assorted Kit Operating temperature: -20 degrees -120 degrees Celsius, fire protection requirements: 94-V2 M3 Black color total 160 pieces. Come with the plastic box Material: Nylon