Trinity 6-cell zip pack comes pre-assembled and packed in blue wrap. Pre-installed white 2-pin connector. Increased voltage for more power. Micro Monster Motor for use with either 5 or 6 cell batteries. Changeable brushes and springs. Pre-installed capacitors. Bronze bushings support the comutator. Sealed endbell, pinion gears, aluminum construction and silver in color. This set includes one 6-cell micro zip pack, one micro monster motor, one 9T aluminum pinion gear, one 10T aluminum pinion gear, one 11T aluminum pinion gear, one 12T aluminum pinion gear, four 1.5mm x 3mm set screws, one 1mm hex wrench and instructions.