The Lezyne Flow Cage SL is a Composite Matrix cage with a design optimized for loading a bottle from one side. Strong cage ribs, top catch, and bottom tab are designed to accommodate several bottle types and shapes securely over rough terrain Low profile design and ovalized mounting holes allow for better fit on small frames Material: Composite Mount Type: Bolt-On Color: Black Defined Color: Black Bottle Type: Standard Access Style: Side Weight: 48 g