Pyrethrum crack and crevice aerosol can be used as a flusher of german roaches around electrical appliances or be used as a general space spray for the knockdown of mosquitoes, gnats, flies, fruit flies, drain flies, phorid flies, and other flying insects. Excellent for Hornets or Bees in a wall.  20 oz. can, contains .5% Pyrethrin, 1% Piperonyl Butoxide, 1% n-Octyl Bicycloheptene Dicarboximide.