THC Check: Instant 20 Ng/ml Ultra-Sensitive Marijuana Test: 5 individual tests
THC Check detects marijuana metabolite in human urine at <b>20 ng/mL, making it the most sensitive instant test on the market</b>.<br><br>It is a simple and easy to use, and provides accurate <b>results in minutes</b>. The test includes very clear test and interpretation instructions.