They work.. so now you have yet another coil option to add to the mix.. this all started when I was growing dissatisfied with the Triton coils.. they were just not lasting for me... so I picked up a Herakles.... really nice tank.. well made.. but just not for me.. but I thought the coils were decent.. I was putting some stuff away in my pouch that I keep my junk in.. and noticed they were almost identical.. so threw one in my super tank.. and worked perfectly!