Vantech 60" Roller Kit Fits 60" Crossbars for H2.1 Series Model H0000BX27BVantech 60" Roller Kit Fits 60" Crossbars for H2. 1 Series Model H0000BX27B The B kit integrates a roller to your H2. 1 rack. This kit is designed for people who constantly load and unload bulky and heavy things on their rack. Save your back, your rack, and your roof line with our roller kit! FITS ON: Chevy Express 1995 On, Chevy Express 1995 On Extended, GMC Savana 1996 On, GMC Savana 1996 On Extended, Mercedes Benz Sprinter 2007 On High Roof 144 WB,