At QL Biotech, we proudly present our advanced K4 Rapid Test Kits, a revolutionary tool for comprehensive drug abuse screening. Designed for clinical, hospital, and forensic settings, our one-step kits offer unparalleled accuracy and dependability. Each K4 Rapid Test Kit is meticulously constructed to detect drug use with remarkable precision. Specifically, it measures Substance K4 levels up to 20ng/ml in urine, delivering results you can trust. The test's simple one-step procedure makes it a user-friendly option for healthcare professionals, eliminating any complexities of typical drug screening methods. But our commitment to quality doesn’t end at Substance K4 detection. Our broad spectrum Drug of Abuse Test Kits includes tests for Morphine, Methamphetamine, Ketamine, Ecstasy, Marijuana, Amphetamines, Barbiturates, and more. Each product ensures optimal sensitivity levels, determined by meticulous cut-offs, ensuring maximum detection accuracy. Also, our test kits are not just efficient but internationally recognized as well. Most of our test kits, including the K4 Rapid Test Kit, carry CE certification, validating their quality and reliability.



Navigating the complex world of drug abuse testing can be challenging, but QL Biotech’s K4 Rapid Test Kits make the journey simpler. They are the embodiment of our commitment to promoting health and wellness through precise, easy-to-use, and dependable drug abuse screening tools. Choose QL Biotech's K4 Rapid Test Kits for your drug screening needs, because when it comes to drug screening, you deserve nothing less than absolute precision and unquestionable dependability.