Product Details • 1 1/2†diameter wheels with hardened steel races and 5/32†ball bearings in extra-heavy 18 gauge steel housing• 1/4†thick vinyl cushion protects mirror against breakage• Integrated handle in side rail• Color coordinated glazing vinyl• Duraflect® copper-free mirror panel has 400lb category II safety backing Track and Channel • Aluminum track and channel• Bottom rolled with jump-proof track• Top channel and bottom track with finish to match• Injection molded top guides for smooth operation Sizes • Custom sizes• Maximum individual panel width is 60â€Â• Maximum opening height is 99â€Â• Standard sizes• Width: 48â€Â, 60â€Â, 72â€Â, 84â€Â, 96â€Â, 108â€Â, 120â€Â, 144â€Â, 168†and 192â€Â• Height: 81†and 96â€Â• Adjustment range for opening height is up or down 1/2â€Â