Paint Thickness Tester - Paint Meter ST-01 for coating thickness on iron and steel Paint thickness meter for magnetic metals like iron and steel Quick check of car body for repairs, repainted areas and filled parts Thickness is displayes by 3 LEDs 5 ranges: 0-200, 200-350, 350-500, 500-1000, and greater than 1000 micron Battery: 4x LR44 (or AG13) included