Because the neutralizing lens power varies with the working distance

Carl Zeiss f170 Binocular Surgical Head 10X/22 B

Heat Up Time to 160°F (71°C): 4 Hrs

Compatibility: Works with multiple thermometer models

Seca 769 Digital Scale with Stadiometer (Used) CAT3 Because the neutralizing lens powerThe Seca 769 Value Digital Column Scale is a state of the art medical instrument that offers amazing features for any digital measuring needs. Made to be cost effective, the column scale has low maintenance which is best for any hospital, clinic or medical facility that performs routine examinations, tests, and experiments. Smart Functions. With an awesome BMI feature, the 769 Value Digital Column Scale performs a reliable medical evaluation of a