Features:Made of high quality nylon, insulated, heat insulating and heat resistant. Corrosion Waterproof spacers are corrosion resistant. rust and easy to clean. clean.Ideal for mounting between circuit boards. and machine cards. They will not slip if used properly. All parts are packed in a plastic box for easy carrying M3 nuts 20 x M26mm screws 20 x M215mm screws 20 x M2.56mm screws 20 M2.515mm screws 20 M3 screws * 6mm 20 screws M3 * 15mm 10 x M2 6 + 6mm connector- Female Spacer10 x M2 8+6mm Male-Female Spacer 10 x M2 10+6mm Male-Female Spacer 10 x M2 12+6mm Male-Female Spacer 10 x M2 15+6mm Male-Female Spacer Female 10 x M2 20+ 6mm Male-Female Spacer 10 x M2.5 6+6mm Male-Female Spacer 10 x M2.5 8+6mm Male-Female Spacing 10 x M2.5 Male-Female Spacing 10+6mm 10 x M2.5 Male-Female Spacing Female 12+6mm 10 x M2.5 15+6mm Male-Female Spacing 10 x M2.5 20+6mm Male-Female Spacer 10 x M3 6+6mm Male-Female Spacer 10 x M3 8+6mm Male to Female Spacer Spacing 10 x M3 10+6mm Male to Female