Pro Smokestop Filter Compatible with Blueair Pro M, Pro L, Pro XL Air Purifiers,
Compatible with Blueair Pro M, Blueair Pro L and Blueair Pro XL Air Purifiers (Pro M = 1 Filter, Pro L = 2 Filters, Pro XL = 3 Filters). Compatible Air Purifier Models Blueair Pro XL, Blueair Pro L, Blueair Pro M.