B01EIY7WQS There are 6 types M3 Threaded Male-Female Standoff each 10pcs and 60pcs nuts, 60pcs screws, total 180pcs in a box. Material: Nylon; Color: Black; Come with a plastic box for you Standoff Length 6 ~ 20mm (not include male end thread length), Male end thread length: 6mm Screw Length 6mm (not include top head); Thread: M3 (3mm), thread pitch: 0.5mm Application in electronics, computers, PC board, DIY hobby etc. to replace the screw fasteners