The BiKASE Big Momma Rack with MIK mounting offers simple and secure storage that is easy on and easy off your bike rack. Multiple pockets to keep you items organized with reflective materials to help you be seen at night with included rain cover to keep your items safe. Sealed inner liner can also make a cooler for your lunch picnics! - MIK Mounting bracket attached. - Dimensions 12" x 5.5" x 7"