HiLetgo 3pcs 400 Ties Mini Solderless Breadboard Clear Circuit PCB Board DIY Proto Prototyping Shield 400 Points Breadboard with 2 Positive & Negative Power Lines on both ends.Perfect for Arduino Shield Prototyping and Testing. Insertion Wire Size is 21 to 26 AWG, 0.016 to 0.028 inches diameter (0.4 to 0.7mm diameter),works with dupont jumper wires kit. White ABS body with black printed legend. Color legend on distribution strips. With self-adhesive tape on the back, make it easy to stick on the Arduino Prototype Shield. Good kits for Arduino breadboard kit proto shield and DIY projects.