Lower chainring bash protection without upper chain retention Reinforced nylon bash guard and a back plate cut from 8mm thick 7075-T6 aluminum Boost and oval chainring compatible 2.5mm chainline adjustment Designed for frames with 2 ISCG-05 tabs only (Evil, Rocky Mountain, etc). Should not be used on frames with 3 ISCG-05 tabs Includes 3 different sizes of bash plate for compatibility with chainrings from 28-36t 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;} Model Underbash Mount ISCG-05 Max Teeth 36 Color Black Weight 68g