Install at any angle, as long as rollers are level and parallel to the floor, Light gap 2-7/8 in on three sides-variable gap due to fabric bundle diameter on roller end, Draw-cable/guide-cable brackets provided with pulley assemblies, Nylon coated cables are low-stretch, high-fatigue, Built-in pulley assemblies for routing of draw cable, Horizontal spring steel stays to withstand reasonable air pressure differentials and gravity, Adapter bracket white powder coat finish, Spline attached fabric, Available with Standard AC or RTS Radio Technology Somfy® AC Controls