Optional snap-on hinged cover for channel FR4X4YL6. Hinge feature enables positioning of cover at angles between 30° to 90°. 6x4 FiberRunner® Routing System – Channel and Covers - Robust, large capacity 6x4 system ideal for use with large cable counts - Multiple spillout options provide versatility to mate to various equipment and rack configurations - QuikLock™ Couplers and Brackets reduce system installation time dramatically - Channel, covers, fittings and other non-metallic system components made from V-0 flame class rated material - Compatible with all sizes of Panduit® FiberRunner® and Panduit® Fiber-Duct™ Routing Systems, cable management, and racks - Compliant with the applicable tests in Telcordia GR-63-CORE Network Equipment Building Systems (NEBS) Level 3 - For other standard colors replace suffix YL (Yellow) with OR (Orange) or BL (Black)