Global Aqua Coconut Shell Carbon Block Filter 2.5" x20",20pcs/case CLEAN WATER - You will have peace of mind knowing you can make your water contaminant-free by removing chlorine and other harmful industrial chemicals. Drink with confidence! HIGH CLASS FILTRATION- High purity coconut carbon provides excellent performance, and it has been exhaustively tested to meet today's demanding health and product standards - Don't settle for less! EASY REPLACEMENT - Designed to fit all standard filter housings, these Carbon Block Filter makes replacing your filters a snap. A great fit for all! LONG LASTING - With its airtight packaging you won't have to worry about your carbon filters going to waste. Make these Carbon Block Filter your filter of Choice!