The TPBL is like TPB2, except the enclosure's front is occupied by the 320x240 TFT LCD and a 4-key sensor keypad.
The TPB2 kit includes top and bottom covers, left and right walls, status LED light guide, LCD, keypad, screws, as well as other small parts.
Front and back walls of the Project Box are formed by rows of connector Tibbits. Unassembled Project Box kits (and systems) come with enough blank Tibbit connector shells to fill all the voids.