SpecCheck Single THC Saliva Drug Test - 4ng/mL (25 Tests/Kit)SpecCheck THC Saliva Drug Test (4 ng mL) Oral Fluid THC Screening Test Cup Tube Format Product Overview The SpecCheck THC Saliva Drug Test (4 ng mL) is a highly sensitive oral fluid screening device designed for the rapid detection of THC (tetrahydrocannabinol) in saliva at a low cutoff level of 4 ng mL. This next generation configuration replaces our previous 5 ng mL THC saliva test, providing enhanced sensitivity for organizations seeking earlier