Removable filter protector extends cartridge life * Quick connect fittings make installation and removal of input and output hoses easy * Connects directly to hydration packs with 1/4" drink tubes * 129 square inches of pleated 0.3 micron glassfiber media with activated carbon core * 1 Quart (1 Liter) per minute, 300 gallon (1150 Liters) cartridge capacity