Flightless fruit fly culture kit for 60 large cultures. Comes with 6.6 pound of SuperFly fruit fly media, 60/32 oz fruit fly cups and poly lids, and 11/2 pound of excelsior. Simply add hot water, mix, let cool, add excelsior and flies ((( flies are NOT included )). These cultures will produce hundreds of flies and last up to 6 weeks. Keep at 74-78 degrees for best results.