1.Item No.:FR-3208 2.Material:aluminum alloy 3.Diameter:32mm 4.2 handling ways:finishing polish and color spary 5.Color:silvery grey and yellow(if you have a large number, you can change the color you need.) 6.Applied range:bus , some mechanical equipment 7.Function:to connect different parts. 8.Certification:ISO9001:2008(now)