WHY CHOOSE US? Our rail is made by 1/4 heavy duty carbon steel, solid inside, frosted black surface. The rail comes in two pieces, instead of mutiple small pieces, the door can roll quietly and smoothly. OVERLAP SPACE? There would be a 8″-12″ overlap space since the 2 doors are hanging on one single rail. The door panel width should be wider than half of the (opening+overlap sapce) or the opening may not be fully covered. EASY TO INSTALL? Professional instruction and customer service team help you solve all installation problems in time. Save the cost of finding a Carpenter or decoration team. PACKAGE INCLUDED? 2x Rail, 4 x Hanger, 5 x Wall spacers, 1xFloor Guide, 2xDoor Stoppers, 2x Hex Key, and other necessary hardware is included as you see in the pictures. DOOR WEIGHT CAPACITY? Door Weight Limited 220lbs. Fit door panel thickness: 1 3/8″ to 1 3/4″.