Spy Labs Secret Message Tools Kit with Invisible Ink Pens wall mounted marble run Perfect tool for HVAC inspection

Perfect tool for HVAC inspection

Proractor Accuracy: 1 degree

applied in automotive sanding

Batteries required: 1 x 3 volt CR2032 battery included

Spy Labs Secret Message Tools Kit with Invisible Ink Pens wall mounted marble run Perfect tool for HVAC inspectionChannel your inner secret agent and swap top secret intel with these clever invisible ink pens. Write hidden messages that vanish once dry, only to be revealed by your fellow operative using the special developer pen. This kit comes packed in a sturdy metal tin and includes professional tips for master level covert communication. It's the perfect gear for any budding detective looking to keep their investigations strictly classified. Brand Thames and