830 tie points total: 630 tie-point IC-circuit area Two 100 tie-point distribution strips, providing 4 power rails White ABS plastic body with black printed legend. Color legend on distribution strips. 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: 6.5 x 2.2 x 0.3in (165.1 x 54.6 x 8.5mm). Peelable adhesive tape backing provided for attaching to a surface. Metal back plate provided. Finished projects can be moved to our 0302PB10 solderable PC breadboard (sold separately) to make them permanent. The 03MB102 is a solderless (plug-in) breadboard with 830 connection tie-points (i.e. 830 wire insertion holes). It has 4 power rails. Solderless breadboards are great for building and testing new circuits because parts can be easily inserted and removed. They are completely re-usable. The 03MB102 has a 630 tie-point IC-circuit area plus four 50 tie-point power rails. The housing is made of white ABS plastic, with a printed legend giving numbers and letters for columns and rows. The internal contacts are phosphor bronze with a plated nickel finish. A peelable adhesive tape backing is provided for attaching it to a surface and an optional metal back plate is provided.