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The TEC-S311M Isotope Fob is a key chain fob specifically designed to hold a standard 3mm x 11mm self-luminous tritium vial. Tritium vials come in a variety of colors, and will glow for many years without requiring any type of “charging” from sunlight. This version of Isotope fob is very similar to the longer TEC-S323 and TEC-S360 fobs, however it is simply shorter in length. This allows you to attach the Isotope to smaller objects such as a key chain flashlight without interfering with its use. And since the vials are short, you get the added benefit of a lower cost compared to the full-length Isotope models. It’s the perfect way to color-coordinate your items in a cost-effective manner!

The TEC-S311M Isotope Fob is a key chain fob specifically designed to hold a standard 3mm x 11mm self-luminous tritium vial. Tritium vials come in a variety of colors, and will glow for many years without requiring any type of “charging” from sunlight. This version of Isotope fob is very similar to the longer TEC-S323 and TEC-S360 fobs, however it is simply shorter in length. This allows you to attach the Isotope to smaller objects such as a key chain flashlight without interfering with its use. And since the vials are short, you get the added benefit of a lower cost compared to the full-length Isotope models. It’s the perfect way to color-coordinate your items in a cost-effective manner!