The 3M™ Oil Quality Test Strips Kit will help save you money, by helping you determine whether your shortening is still safe to use. We all know that determiningwhether or not shortening is still safe to use in your dishes can be tricky; well, the 3M™ Oil Quality Test Strips Kit is here to help! Easy to use, easy to read and eliminates guesswork. Helps keep fried food quality high. Helps save money by preventing the premature disposal of shortening. Works equally well in animal, vegetable or A/V blend shortenings. Each kit includes one bottle of 3M™ Oil Quality Test Strips and one wall chart. 40 strips/bottle; 4 bottles/case.