Product Description The as a spare part The replaces a broken mounting rail on your pannier with QL2.1 system. To choose the short or long version, it is best to measure the old rail or use the hole spacing on the bag as a guide. Screws and nuts for fastening are included. Compatibility:panniers with QL2.1 fastening systemModels:23.5 cm: Length:23.5 cmBolt Spacing:11 cmManufacturer Number:E245 31.5 cm: Length:31.5 cmBolt Spacing:14.5 cmManufacturer Number:E244Contents:1 x 3 x bolts3 x nuts Manufacturer: ORTLIEB Sportartikel GmbH Rainstraße 6 91560 Heilsbronn Germany info@ortlieb.com