Colour coded for easy identification, each stick contains a single test sphere.
Sphere sizes up to 5mm diameter are available in:
Ferrous
Brass
Phosphor Bronze
Stainless Steel
Aluminium
Please describe your project. Call for Quote /content/us/en/home/products/Product-Inspection_1/safeline-metal-detection/test-samples/rod.fb.1.c.11.html