I need help on picking rads for a 900D. I want to know what thickness the duel rads in the front of this case in this video
I believe that all the rads in the video are EK. Judging from the video I'd say it's the slim version: http://www.ekwb.com/shop/radiators-fans-accessories/radiators/ek-coolstream-pe-240-dual.html
I really recommend the Magicool 240mm Slims. They are £30. I've used them in every build. Half the price, so you can get a bunch of them.
My alphacool 120mm was the same price.
http://www.watercoolinguk.co.uk/p/Magicool-G2-SLIM-240mm-Radiator_48575.html