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 Refractometer 1 x Cloth 1 x Instruction Manual 1 x Straw 1 x Screwdriver 1 x Plastic Box 1FAST RESULTS: This handheld refractometer features automatic temperature compensation to make quick results easier. 2PREMIUM MATERIAL: The main part of the milk concentration meter is made of aluminum, which is light weight but sturdy and durable. 3ACCURATE RESULTS: Milk tester refractometer has a concentration measurement range of 0 to 20% with a minimum scale of 0.2%. 4COMPACT AND PORTABLE: Milk meter refractometer is compact, lightweight and easy to carry around for use anywhere, anytime. 5EASY TO USE: Portable refractometer with straw and other accessories, ergonomic handle with non slip, comfortable grip.