Feature: 1. FAST RESULTS: This handheld refractometer features automatic temperature compensation to make quick results easier. 2. PREMIUM MATERIAL: The main part of the milk concentration meter is made of aluminum, which is light weight but sturdy and durable. 3. ACCURATE RESULTS: Milk tester refractometer has a concentration measurement range of 0 to 20% with a minimum scale of 0.2%. 4. COMPACT AND PORTABLE: Milk meter refractometer is compact, lightweight and easy to carry around for use anywhere, anytime. 5. EASY TO USE: Portable refractometer with straw and other accessories, ergonomic handle with non slip, comfortable grip. Specification: Item Type: Milk Meter Refractometer Material: Aluminum Measuring Range: 0-20% (Milk) Minimum Scale Value: 0.20% Gross Weight: Approx. 213g/7.5oz. Package List: 1 x Milk Meter Refractometer1 x Cloth1 x Instruction Manual1 x Straw1 x Screwdriver1 x Plastic Box