Beautifully Made From Alloy, is a New Shimano Dura Ace 39T-MW 11-Speed FC-R9100 110MM BCD Road Super Glide-X chainring. Mates with a 53T-MW ring. In Shimano box. Works with 11-speed chains and a Shimano four-hole double crank. Made in Japan quality from 2019. 34 grams/1.1oz. CR5558.
eBay