Are you looking for professional and convenient screw and nut kits? Our products will be your . Made of premium materials for excellent durability and practicality, suitable for many areas like PCB and flight controller stack building, different tools can meet your different demands. Features -Color:Black -Material:Nylon -Size:17.30X9.50X2.00cm/6.80X3.73X0.79in -Made of premium nylon material, these head screws and nuts are to use for long time. -Well-designed, with good stability and fastening, can bring much more convenience to your work. -Widely applied for PCB and flight controller stack building, motion sensor mounting, board building, controller board building, etc -The high-strength screw set has practical functions, different tools can meet your needs perfectly. -Strong and sturdy threaded design of the nylon spacer, easy to use, not easy to skid. Package list: 20 x male to female spacers(6mm+6mm) 20 x male to female spacers(10mm+6mm) 20 x male to female spacers(15mm+6mm) 20 x male to female spacers(20mm+6mm) 20 x double female spacers(6mm) 20 x double female spacers(10mm) 20 x double female spacers(15mm) 20 x double female spacers(20mm) 80 x nylon nuts 20 x nylon washers 20 x screws(6mm) 20 x screws(12mm) 20 x screws(20mm)