Specification:
Item Type: Battery Hydrometer
Material: Glass + Rubber
Color: As the Picture Shown
Measure Range: 1.10-1.30
Whole Length: 275mm/10.8in
Package List: 1 x Battery Hydrometer

Note:
It is not easy to master the concentration ratio of water in battery, so the densitometer is very important. Usually the density of the electrolyte should be controlled at 1.27.