When using fentanyl or xylazine test strips to check for contamination, you need to measure accurately. These static-free, polypropylene micro scoops make it easy to measure approximately 10 mg of crushed powder. Alternatively, you can use a milligram scale. A tightly-packed, level scoopful (not rounded) is almost exactly 10 mg for all the drugs we’ve tested, including meth, cocaine, MDMA, ketamine, and many others. Rinse thoroughly before re-using.