We offer Bicycle Steel Seat Collar. Seat clamp, Bicycle steel seat collar for frame parts1.Modelnumber:HY-SC022.Size:16*28*8.5mm3.Material:Steel 4. Certification: ISO9001:2008Applications:bicycle seat collar for bicycle frame partsIf you want to know more, please visit our websiteOur website is: http:www.haiyuecorp.com