100mm 300mm: (+ 0. 03mm) >300 350mm (+ . 05mm) The Starrett 5006BZ 14 350 Electronic Groove Caliper is ideal for measuring internal and external grooves on large workpieces. It offers generous diameter and jaw depth" name="description"/> 100mm 300mm: (+ 0. 03mm) >300 350mm (+ . 05mm) The Starrett 5006BZ 14 350 Electronic Groove Caliper is ideal for measuring internal and external grooves on large workpieces. It offers generous diameter and jaw depth" property="og:description"/> 100mm 300mm: (+ 0. 03mm) >300 350mm (+ . 05mm) The Starrett 5006BZ 14 350 Electronic Groove Caliper is ideal for measuring internal and external grooves on large workpieces. It offers generous diameter and jaw depth" name="twitter:description"/>