SXg Alloy Chain GuideFull-sized upper and lower guides with quiet TPU co-molded innerNylon skid attached directly to integrated lower guideSwingset hardware allows guides to rotate apart for easy chain installationInstalls and adjusts with a single 4mm hexCompatible with chain lines 49mm and wider including Boost 148Compatible with 1x7 1x9 1x10 and 1x11 drivetrains TECH SPECS table{border-collapse:collapse;width:100%;} td{text-align:left;padding:8px;font-weight:350;} tr:nth-child(even){background-color:#f2f2f2} th{background-color:#eb212e;color:white;text-align:left;padding:8px;} .desc .specs-heading{font-size:24px;font-weight:600;padding-top:35px;border-top:3px solid #f0f0f0;display:inline-block;border-bottom:4px solid #eb212e;width:142px;margin:0;} Color Black Chainguide Mount Type ISCG-05