Marijuana testing kit information: Each marijuana testing kit we offer in our One-Stop-Shop is highly rated and either on sale or sold at discounted prices. Find the marijuana testing kit suiting you best by browsing our store categories. You have the choice between saliva and urine devices ranging from single drug to 13 panel screens. Any marijuana testing kit can also be administered onsite at your location by our third party administrators or you can choose any collection site in our expansive network. For further information on how to integrate the marijuana testing kit of your choice into your drug testing program, see our resource section.