Nice! Titan-Eze metal stand. I've got the 75g version and keep a 75g on top and a 55g on the bottom. They don't look the part and seem flimsy, but mine has been in service 3-4yrs now. No issues.
Supposedly my 75g version is designed to hold twin 75/90/120g tanks. I couldn't imagine twin 90s or 120s. in that small a footprint. That's a LOT of weight on the floor.