niceeshop(TM) Solderless Plug In BreadBoard 830 Tie Points 4 Power Rails White plastic,with black legend; Colored power rails; Size:16.5x5.5x0.9cm/approx 6.5x2.2x0.4inches 830 tie points total. 200 in 2 power rails, 630 in a 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) Peelable adhesive tape backing provided for attaching to a surface