... 2.EN standard 3.super light 4.OEM high module seat post carbon fiber 27.2mm/ 31.6mm Features:1. Made of ... by itself or woven into a fabric. The properties of carbon fibers, such as high stiffness, high tensile strength, low weight, high ... engineering, military, and motorsports, along with other competition sports. high module seat post carbon fiber 27.2mm/ 31.6mm