I haven't seen them on the shelf lately, but then I haven't looked either...I had to clear my home once several years back..came home and found an open window. I set off 6 of the "D-Con" brand 4-gone "roach bombs". In about 3 minutes, a local "punky boy" climbed out the window, "koff koff hack hack Why the *** did you gas me, man? ? ? ?" he asked, as the police hauled him away.......