The Pop 2 vision can support radiators in the top of the case, and in the rear.
In the rear, the maximum radiator size is 120 mm.
The top of the case supports radiators in the size 120/140, 240/280, and 360 mm. The maximum thickness for these are 68 mm, and maximum width is 120 mm for 240/360, and 160 mm for 140/280.
IMPORTANT: Note that the maximum radiator length for 360 radiators is 400 mm, and the maximum for 280 radiators is 390 mm. Extending beyond this will cause the radiator to not physically fit inside of the case.
It is not possible to install a radiator on the side nor in the bottom of the case.