Yep, they made up to a Melo 5 I believe.It's been a while but I used them in a Melo tank, Melo II I think. It's older though and Idk if they have newer renditions or what coils they may use.
Not sure if you found a tank yet but I noticed these while snooping around IVS:I have 4 or 5 boxes left of the older style CCELL coils. Looking for a new tank that's compatible with them but i can't seem to find anything, am i out of luck?
I'd prefer plain stainless or black, top fill, and 22-23mm base.