Description: Designed for the testing of the concentration of battery fluids, antifreeze and cleaning fluids Sturdy and light weighted Aluminum body Easy and very convenient to use Can be easily calibrated with a mini-screw driver High quality and accurate testing result Specification: Size: 160*44mm/6.3*1.7inch Measuring Range: Ethylene Glycol: -60 ºC - 0 ºC 0-66.6% Propylene Glycol: -50 ºC - 0 ºC 0-62.4% Battery Fluids: 1.100 - 1.400sg Resolution Factor: Ethylene Glycol: 5 ºC Propylene Glycol: 5 ºC Battery Fluids: 0.01sg Package Includes: 1 Piece Refractometer 1 Piece Pipette 1 Piece Screwdriver 1 Piece Portable box 1 Piece Wiper