The 100% FACT carbon fiber S-Works Carbon Zee Cage II is compatible with SWAT(TM) solutions for tool and storage integration. It also features a unique left-side loading design that allows you to easily manage bottles when space on the frame is limited, or for when you&';re down in the drops. SWAT(TM) design allows for storage and tool integration. FACT carbon construction creates a splendid fusion of strength and light overall weight. Side-load design for easy in-and-out accessibility for frames with compact bottle mounting area. Left-hand loading on the down tube-right-hand loading on the seat tube. Accepts SWAT(TM) Cage Mount MTB Tool. Accepts MTB SWAT(TM) Box (when used on compatible frames). Weight: 28g