http://www.sparkdoorhardware.c....om/barn-door-hardwar Barn Door Hardware Satin nickel barn door kits are specially designed for single/double shunt/bypass, and they are standard with satin nickel finish, which can effectively improve the rust prevention, corrosion prevention and wear resistance of these kits. They can be installed on the top of the door, whether it is home, hotel, office or industrial barn door. The whole installation procedure is not complicated, and installation instructions are also included in the package. In addition, we have carried out strict performance test and quality inspection on this product, and the conclusion shows that it can run for 100000 times. Welcome to negotiate with us at any time! Features 1. The track length includes 72 ", 78 '' and 96". You