Smraza Breadboard MB-102 830 Point Solderless PCB Experiment Test Circuit Board for Arduino 3pcs breadboard as one set. Total 830 tie points in one pcs. Two distribution strip 200 holes, 630 in a IC-circuit area (30 x 10 matrix) . Insertion Wire Size is 21 to 26 AWG, 0.016 to 0.028 inches diameter (0.4 to 0.7mm diameter) ABS plastic material.No welding ,color coordinates easy for you to identify and install it. Phosphor bronze nickel plated spring clips, rated for 50,000 insertions. With self-adhesive tape on the back, make it easy to stick on the Arduino Prototype Shield. Package Included:3 x MB-102 830 Point Solderless PCB Breadboard Size: 16.5 x 5.5 x 1cm/6.5" x 2.2 x 0.4"(L*W*T)