Each Nano Stick standard package kit (with case) comes with 1 Nano Stick, 1 loading plate, 1 bubble checker, and a user guide. The preferred color of your choice can be selected (Black, Blue, Red, Gold, or Silver). The Z-Dimension, the height of the center of the light beam, is 15 mm. The beam pathlength is 0.5 mm. Fits standard 10 mm cell holder. D Nano Sticks have dual sampling ports and S have a single sampling port.