... the magneti ScopeThis instrument can quickly, non-destructive and precise to measure a non-magnetic coating thickness on the magnetic metallic ... 10,Minimum curvature radius:protruding 1.5mm, concave 6mm.11,Probe diameter:13mm.12,Power supply:7# alkaline cell , ... 30mm (H) mm.16, Weight : about 190g .17, Accessories:probe, standard thickness pieces(5) , martensite stainless steel block, operating manual ...