Hope headset solutions: separate top and bottom headset cup assemblies for tapered, reducer and conversion applications IS (36x45 degree Cane Creek Integrated), ZS (Zero Stack), or EC (traditional, External Cup) available for reduced 1-1/8" and tapered 1.25>1-1/8", 1.5>1-1/8" steerers 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 Conventional Upper S.H.I.S. ZS49/28.6 Upper/Lower Upper Stack 7mm Color Black Weight 64g