Is the price for one bar or for a pair of bars? Does each bar contain all the materials needed to attach it to the car? ...or do you also need to buy fixing feet? https://www.galaxus.ch/fr/s4/product/thule-rail-de-bord-affleurant-barres-de-toit-accessoires-12707056 OK to fit the Thule SnowPack L? https://www.galaxus.ch/fr/s4/product/thule-snowpack-l-porte-skis-6049401 Thank you very much for your help.