Set of 2 black bottle cage adapters with mounting screws. - Type: Bottle cage adapter - Quantity: 2 pieces - Included: Set of mounting screws - Material: Plastic - Color: Black Thank you for viewing. This adapter is for attaching a bottle cage to handlebars, long stems of 80mm or more, seat tubes, etc. You can fix the bottle cage at your preferred angle. ◇Specifications/Performance Applicable pipe diameter: 22-36mm Weight: 35g Bottle cage mounting screws included A 4mm hex wrench is required to install the adapter.