Smraza 400 Points Breadboard for Arduino, 400 Tie-points Solderless Circuit Breadboard Kit work with Arduino Mega2560, Uno R3 3pcs 400 ties holes and high quality solderless breadboard. Size:3.3 x 2.1 x 0.3in (84 x 54 x 9mm) Works with dupont jumper wires, the size of jumper wires is 21 to 26 AWG, 0.016 to 0.028 inches diameter (0.4 to 0.7mm diameter). Total 400 tie points, 300 for 1 Terminal Strip in a 30 x 10 matrix, 100 for 2 Positive & Negative power rails on both ends. ABS plastic material. Completely reusable. With self-adhesive tape on the back, make it easy to stick on the Arduino Prototype Shield. No welding ,color coordinates easy for you to identify and install it. Phosphor bronze nickel plated spring clips.