HD Bar Nkwi Flores EcoRestoration Alliance Jon Schull. Yakima's burliest crossbar ever, the Yakima HD Bar is the one for heavy loads, rugged terrain and maximum utility. It delivers the muscle our new truck racks demand, and works with our StreamLine towers to get the heavy duty job done right. The engineered aluminum construction provides superior support without weighing things down, integrated tie down points to simplify load security, and T slot attachment technology for adding gear mounts the fast, easy way. The Yakima Way. Strong, lightweight aluminum construction handles heavy loadsgreat for rooftop tents Integrated tie down points on endcaps make it easy to secure gear T slots top and bottom to easily add compatible Yakima gear mounts Includes rubber infill for top T slot for load protection and wind noise reduction Built to lastand look good doing itwith a durable black powder coat finish Compatible with all StreamLine towers with our new HD Bar SL Adapter (sold separately) Available in variety of lengths to create custom set ups Size Length Width Height Weight SM 55 in 3 in 1. 5in 9. 61 lbs MD 60 in 3 in 1. 5 in 10. 68 lbs LG 68 in 3 in 1. 5 in 11. 65 lbs XL 78 in 3 in 1. 5 in 12 lbs