Mechanical Chatillon Hanging Scales are good quality & accurate scales that are lightweight, portable and virtually indestructible, making them ideal for birth bags, nurseries, and home health programs. The scale mechanism is constructed of non-corrosive brass, with numerals and graduations embossed in black, They can be calibrated for tare functions and provide measuresements in both pounds and kilos. the IN 12 scales weighs to 12 pounds in 2 oz increments and requires a sling for holding the baby.