Compact Carbon CanisterCarbon canister systems utilize an engineered charcoal canister to reduce hydrocarbons entering the atmosphere. Other components of a carbon canister system are designed to ensure the tank fills to the proper level every time without spit-back or well-back. All Attwood carbon canister systems are designed to ensure liquid fuel or water does not reach the canister and are compatible with Jerry Can and marine nozzle refueling.Features: This is a single pack that contains two Compact Carbon Canisters Brackets OEM Installed Low permeation shell reduces overall system emissions Can be mounted in any orientation using brackets provided EPA / CARB Certified Fits a 5/8" vent hose Specifications: Trailerable Vessel Capacity (EPA Rating): 70 Gallon Non-Trailerable Vessel Capacity (EPA Rating): 110 Gallon Trailerable Vessel Capacity (CARB Rating): 56 Gallon Non-Trailerable Vessel Capacity (CARB Rating): 110 Gallon *Compatible with Ethanol blended fuels Quick Guide (pdf)