IT'S BACK...Probably the fastest working fly killer you will use.

The well known azamethiphos active ingredient you have been waiting for is back coupled with fly attractants. Once sprayed or painted; flies will be lured to their death in an instant, resulting in - No More Flies!

TwentyOne is a rapid and long lasting fly killer specially formulated for animal housing. Flies are attracted to the applied areas and upon contact with TwentyOne are killed quickly. TwentyOne regulates most fly breeds that constitutes an economic threat to farmers. If correctly applied as instructed, TwentyOne fly killer can be effective for up to 10 weeks.