Combat 12 Pack Dual Attack Superbait Roach Killing Gel Plus Roach Baits. It contains 12G gel and 12 baits. The gel targets the nest to eliminate eggs, while the baits kill the existing roaches. The active ingredient on baits is Fipronil 0.03%, and the active ingredient on gel is Hydramethylnon 2.15%. It is for killing German roaches and other small roaches.