(2)-Pack, The 'Original' AC Line Drainline Buildup Remover Air Conditioner Condensate, 32 Ounce Pack of (2) 32 ounce Bottles Helps Prevent Clogs and Water Leaks in A/C Drain Lines Helps to Remove Slime Build-Up in Drain Lines Biodegradable & Non-Corrosive Use Every 3 to 6 months Replaces / Supersedes: NuLine , Nu Line , Nu-Line , NL2 , NL-2 , AC Line WACL32 , 021449976909 and Similar Drain Line Products.