Made from premium nylon material, these screws and nuts are strong, durable, owning good texture, can serve you for a long time without being or deformed. Simple in design, light weight, practical in function, has excellent fastening effect and stability, giving you satisfying using feeling. Features -Color:Black -Material:Nylon -Size:17.30X9.50X2.00cm/6.80X3.73X0.79in -Made from premium nylon material, high hardness, this screws and nuts assortment is durable for . -Reasonable thread structure design can effectively avoid screw loosening and make it more stable. -The assortment come with nylon spacers, screws, nuts and stand-off, sturdy and light weight, to meet your demands. -Easy to store and carry by the storage , convenient for you to use at any time, will be your perfect choice. -This machine screw nut kit is very easy to install and widely used in fixing PCB, drone, computer motherboard and other accessories. 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)