Manufactured by Energetics Science of Hawthorne, NY this is a PV Detector Probe Kit. This kit contains 4 interlocking pieces. There are 2 rigid and 2 flexible pieces. There are two Probes one on the rigid piece (35-1/2" long by 1/2" in diameter) and one on the flexible piece (56" long by 3/8" in diameter) . There are also two extension pieces one rigid (30-1/2" long by 1/2" in diameter) and one flexible (60" long by 3/8" in diameter). Not sure what this item was exactly used for, but they are in good condition. Found one with a government Tag stating that these are in Code "A" Condition on Feb, 12 1987. Military surplus. Nice case. If you have been looking for one of these for a long time, here's your chance! Only have 3.