Beautifully made from alloy, is an Shimano 600 130mm bcd 53T touring / road Biopace LD chainring. Out of box. Gear-Cut teeth and Silver in color. Works with 5/6/7/8-speed chains. Equal in quality to Deore XT and made in Japan quality, from 1987. 79 grams/2.7oz. CRB095.