We are so confident that DrainGel will help solve your small fly problems that we are willing to send you a quart sample free. To qualify for this free sample you must be a dialysis or kidney center that is listed in the "National Listing of Medicare Providers Furnishing Kidney Dialysis and Transplant Services." If you have an interest in trying DrainGel, fill in the following form and submit it to American Bio-Systems. Each field in the form must be completed for us to fulfill your request. If your browser does not support forms, send your request by email to customersupport@bio-systems.com