Description Reviews The Drug Probe is used for scent detection work. This cylinder tube can be used for narcotics as well as track training and other scent detection work. There are four evenly spaced holes for the scent to move out of the tube. One end has a secure cap for loading and unloading product. Made in USA Constructed from durable schedule 40 PVC Size of the drug probe: 1-1/4″ diameter x 9″ length