Tritec Collection 8' 4" Long Top Hung Glass Sliding Door Fitting Set with Upper Track and Lower Guide Create an attractive sliding door system with this top hung track. The lower guide serves to secure the door, while the upper track provides the support for the door. The running gears provide the aesthetic focal point while door stoppers and wall attachments complete the system. The Tritec Series is designed for 1 or 2 sliding doors, and features smooth, quiet operation, simple installation and stainless steel components. It is height adjustable up or down 1/4" and works for doors up to 220 lbs. Features: For 1 sliding glass door Smooth, quiet operation Maintenance-free Simple installation Stainless steel components Door and door handles not included Includes: 100" (2.54m) upper track 4 wall attachments 2 door stoppers 2 running gears 1 lower guide Specifications: Maximum door weight 220 lbs. (100 kg) For door thickness 5/16" to 1/2" (8 - 12.7 mm) Height adjustable +/- 1/4" (6 mm) Hafele is committed to finding better ways and it shows in their innovative and beautiful line of door hardware products. These products will lead to better organization and the peace of mind that comes with Hafele brand products. In addition to quality and beauty, Hafele is committed to reducing their environmental impact, so you can buy these products with confidence in every aspect.