ClenAir&reg; PurCool Green &bull; Condensate Pan Strip # PCG5MS , Treats up to 5 Tons This Item Ships FREE! Good up to 5 tons , Lasts up to 6-months Natural 'Green' , Biodegradable Product , Non-Corrosive , Non-Toxic & Environmentally Friendly Helps Prevent Drain Pan Overflows & Foul Drain Pan Odors , Non-Floating / Adheres to Drain Pan Supersedes / Replaces: 61044 , PCG5MS , PCGMS , 745310020064 , ClenAir , Clen-Air , PurCool 'Sock' Strips , Nu-Calgon , NuCalgon and many other Drain Pan Products.