*No purchase necessary. This promotion is available only to life science professionals 21 years or older in the USA (excluding Puerto Rico) and Canada. The Free Invitrogen Flow Cytometry Reagent Selection Tool Kit is available to eligible participants who register on the thermofisher.com/flowtoolkit no later than December 31, 2018 or until gift supplies are depleted, whichever comes first. The estimated value of the Flow Cytometry Reagent Selection Tool kit is $5 USD. One free gift per person. Healthcare Professionals may not participate in this promotion. The term Healthcare Professionals includes individuals (clinical or non-clinical physicians (MDs and MD/Ph.D.s), physician assistants, nurses, technicians, research coordinators, administrators and purchasing personnel, etc.) and entities (including hospitals, rehabilitation centers, nursing facilities, home health agencies, clinics and group purchasing organizations, managed care organizations, physician group practices, medical directors for health insurance organizations, etc.) and their employees and representatives. By registering, you warrant that you are not prohibited by employment, contract, or law from accepting a gift Life Technologies. Offer void in where prohibited, licensed or restricted by federal, state, provincial, or local laws or regulation or agency/institutional policy. Other restrictions may apply.