Helps Eliminate Odors: Kit helps eliminate odors that are released from your boat's holding tank vent. Provides Maximum Odor Control: Filter contains granular activated carbon (GAC) for maximum odor control Includes: A filter, mounting bracket and fittings for standard garden hose connections, 3/4" and 5/8" barbed hose connections. Easy to Install: Installs easily to your boat's vent hose Dimensions: Mounting bracket measures 12-1/8" (L) x 2-3/4" (D) x 2-3/4" Note: The filter will last an entire boating season or more, depending on the usage.