Nylon Hex Spacer Standoffs: nylon motherboard standoffs and screws nuts are made of premium nylon material, which has resistance, non- and strong for long time service Brass Hex Spacer Standoffs: brass motherboard standoffs are made of premium brass, matched screws and nuts are made of 304 stainless steel Wide Application: It is suitable for electronic maintenance and enthusiasts who like to assemble small toys by hand; The spacers & standoffs screws kit are easy to install and widely used in fixing drone, PCB, computer motherboard and other accessories Features: The M3 laptop screws kit has finish with quality threads, thread cleanly and burr free, They are used for insulation and isolation of circuit board, which plays the role of supporting and fixing the circuit board Package: You get 640 pcs M3 motherboard standoffs screws and nuts in a box with compartments, easy to store and carry, Weight: 0.85098433132 pounds, Manufacturer: Teuypty