For an additional fee on Generation 3 monocular or binocular orders, Night Optics USA will hand-pick a night vision tube free of major visual defects and with a Signal to Noise Ration (SNR) of at least 24. When night vision tubes are manufactured, there is often little control in minor discrepancies of graded quality and the appearance of some visual defects. Similar to shopping for precious stones, a completely flawless night vision tube is a rare find. A few small black flecks in the users field of view, small faded lines, or other aberrations are normal when purchasing night vision equipment. However, some customers require a more perfect tube for filming or other purposes. By applying the $200 hand-selected fee to your order, Night Optics will ensure that you receive a more perfect tube installed in your device, free of any significant visual flaws.