1. Keeping the bottom of a circuit board from a metal enclosure2. Holding a PCB board or other electronic components off the back of a polycarbonate board(eg. Lexan) or acrylic ornament (eg. Plexiglass)RC receivers: eg. Taranis qx7,Flight controller (), distribution board (PDB),Motherboard,Robot, Multi copter/ Multi rotor,3D printing electronicsOperating temperature: -20C - 120 CScrew thread diameter(): M3/3mmMale thread lengths(): 6mm(both standoffs and screws)Thread pitch: 05mmMaterial:nyloncolour:BlackPackage Contents:80 * Nuts M320 * M3 Washer20 * M3*6mm Screws20 * M3*12mm Screws20 * M3*20mm Screws20 * M3(6mm+6mm) Single Head20 * M3(10mm+6mm) Single Head20 * M3(15mm+6mm) Single Head20 * M3(20mm+6mm) Single Head20 * M3(6mm) Double-Pass20 * M3(10mm) Double-Pass20 * M3(15mm) Double-Pass20 * M3(20mm) Double-PassOnly the above package content, other products are not included.Note: Light and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.