Veewon 400 Tie-points Solderless Prototype Breadboard PCB Experiment Test Circuit Board White plastic,with black legend; Colored power rails. 400 tie points total: 300 tie-point IC-circuit area plus two 50 tie-point distribution strips providing 4 power rails. Contacts are Phosphor Bronze with Plated Nickel Finish, rated for 50,000 insertions. Rated at 36 Volts, 2 Amps. Insertion Wire Size is 21 to 26 AWG, 0.016 to 0.028 inches diameter (0.4 to 0.7mm diameter) Size: 3.3 x 2.1 x 0.3in (84 x 54.3 x 8.5mm).