JOST International designs and manufactures fifth wheels, landing gear, kingpins, turntables, hydraulic cylinders, and aerody ... namic devices for the road transportation market from two manufacturing plants and distribution centers in North America. Our corporate headquarters in Grand Haven, Michigan also serves as the manufacturing facility for our landing gear and king pin product lines which operates under third party ISO9001 certification. We manufacture our fifth wheel product line in Greeneville, Tennessee and have been awarded certifications in TS16949 as well as ISO14000, which are outlined in our Environmental Policy. read more