Product Specification Model Number Range Reading HGS 300 0-300 mm /12″ 0.01mm / 0.0005” HGHD 450 0-450mm/18″ 0.01mm / 0.0005” HGHD 600 0-600 mm/ 24” 0.01mm / 0.0005” HGHD 1000 0-1000 mm/ 40” 0.01mm / 0.0005”