Dia-Compe has re-released their popular hinged MX seat clamp from the early 1980's. These are BRAND NEW - they are not NOS. * Color: DARK BLUE ANODIZED * Size: 25.4mm (1") inner diameter (fits most frames that take a 22.2mm (7/8") seat post, but as always, measure the outer diameter of the seat mast tubing of your frame or the inner diameter of your existing seat clamp). * Material: Aluminum alloy * The "MX" is stamped - the "Dia-Compe 25.4" on the top edge is laser engraved. Please note, some frames have particularly thin tubing and are not ideal for this clamp - if the seat mast tube of your frame measures even slightly less than 1" (25.4mm), you may have to shim this clamp to make it work.