The original Can-Filters is written on the side. Its a Can-9000.

Im guessing this is it: http://www.amazon.com/Can-Carbon-Fil.../dp/B00557SY4M

Its doing a fantastic job anyway...I never have to open a window..
Ill be putting up an update in about a week to show the start of flowering.
Its looking good so far I cut down 2 plants as they were male. But the rest are looking very sexy I must say