BreadBoard-1660T is a transparent solderless (plug-in) breadboard. The transparent breadboard is great for students because the internal connections can be seen. It has a total of 1660 connection tie-points (i.e. 1660 wire insertion holes). It has 8 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 BB1660 has two 630 tie-point IC-circuit areas plus eight 50 tie-point power rails. The housing is made of transparent 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 optional metal back plates are provided. BPS BreadBoards are Lead-Free and RoHS Compliant. Finished projects can be moved to a SB1660 Solderable PC BreadBoard to make them permanent.