QBL1082 Features: * Ball * State of the art filter media for use in fresh and salt water wet/dry systems * 150 Drip points * Contains 2.5 gallons * Connect together or randomly place in the filter box * Helps produce turbulence, aiding in the gas-exchange process * Suggested usage is 1 gallon of bio-pin balls per 20 gallons for salt water or 35 gallons freshwater * Large 185 count Dimensions: * Dimensions: 8.63"" H x 8.63"" W x 8.5"" D