SCNTCN-Specifications:This refractometer is a portable, precision optical instrument used for measuring the freezing point of either propylene or ethylene glycol based antifreeze systems. It can also be used for checking the strength of electrolyte solution batteries. It features high-quality optics with ultra smooth focusing. It is a convenient tool to check your automotive coolant and protect your car engine. Item Name: Antifreeze Fluids RefractometerMaterial: Plastic + MetalFeatures: Portable, Precision, Easy to UseSize: 6 x 1.5 x 1.5 (Approx.) Notes:Due to the light and screen setting difference, the items color may be slightly different from the pictures.Please allow slight dimension difference due to different manual measurement. Package Includes:1 x Antifreeze Fluids Refractometer1 x Mini Screwdriver1 x Pipette1 x Cleaning Cloth1 x Carrying Case