Ortlieb Spare Inserts for QL1/QL2-HooksFeatures: The right hook inserts allow you to securely attach your ORTLIEB pannier with its proven QL1 or QL2 mounting system (16 mm) to virtually any bike rack. The right hook inserts allow you to securely attach your ORTLIEB pannier with its proven QL1 or QL2 mounting system (16 mm) to virtually any bike rack. For models with the QL1 system from 2005 and models with the QL2 system Details (Per Pannier): 2 inserts measuring 8 mm 2 inserts measuring