UCEC 3PCS 400-Point Proyotype Solderless PCB Breadboards with 3 Tie Jumper Wires for Arduino(3-pack, 3+3) Works great with Arduino or electronic and electrical experiments. 400 tie points total: 300 tie-point IC-circuit area plus two 50 tie-point distribution strips providing 4 power rails. 400 Points Breadboard with 2 Positive & Negative Power Lines on both ends. Peelable adhesive tape backing provided for attaching to a surface. Metal back plate provided. Including: 3 x 400-Point Breadboard + 3 x Jumper Wires