Product Features: Cables length : 10cm / 20cm / 30cm Quantity: 40 pin / 90pcs / 120pcs Standard : Male to Male (M-M) / Male to Female (M-F) / Female to Female (F-F) Connectors Type : Standard 2.54mm pitch dupont housing connector / 1pin-1pin 10 Colors : Blue Red Brown Black White Gray Purple Green Yellow Orange Gauge : 24AWG Max Current Value : 3A Material : TINNED COPPER, PVC Core material : TINNED COPPER( Advantages : Easy welding / Srong Conductivity /Stable conductivity / Rust-proof / Durable) Needle materials : Tin copper clad( Advantages : Shiny / Firm / Straight(Not easy to bend damage) / Rust resistant / Weldable) Wrapping material : PVC(Environmental protection material without smell&smeech / Flame retardant / Heat resisting&Safty) Applications : For DIY experiment / Electronics projects / Arduino Boards / Raspberry Pi / Parallax / Breadboard / PC motherboard / PCB project We choose Copper to be the main material of the jump wires core to ensure the stability of its current, and a layer of tin is plated on the outer layer to prevent the copper metal from oxidizing to prevent the resistance value from increasing. Tin-plating will enhance the durability of the wire and make the life cycle longer than ordinary products. In addition, plating a layer of tin on the outer layer can increase the thickness of the terminal, which will become more stable during use.Please feel free to choose our high quality products. 10 / 20 / 30 cm Large Head Jumpers Wire Header Cable Assorted Kit ( 40pin / 90 pc connection kit / 120 pins )