Milk Lactometer range 0-40, calibrated at 84°F zeal Type made of borosilicate/Neutral Glass
Milk Lactometer range 0-40, calibrated at 84°F metal scale mercury polished made of borosilicate/Neutral Glass
Milk Lactometer quevene type range 0-40/15-40/20-35/20-40/, calibrated at 60°F made of borosilicate/Neutral Glass