The compact design of these testcards makes them ideal in many metal detector calibration applications. Testcards are made from solid acetal copolymer. 2.125" x 3.375". Certified metal spheres arecompletely sealed within the card. Testcards are red (ferrous), green (non-ferrous), and blue (316 stainless steel) for easy identification.
Calibrating your metal detector has never been easier. These metal detector testcards are just examples of the many styles of tools available. Please call 800/826-8302 for availability on test cylinders, whips, balls, sticks, or any special applications.