![How do I know which one is genuine on SM-RT66 rotors? One says made in China (SK) while other says Japan (RA). Both has different edges. Please confirm. Got china one from How do I know which one is genuine on SM-RT66 rotors? One says made in China (SK) while other says Japan (RA). Both has different edges. Please confirm. Got china one from](https://i.redd.it/k3tre6cqu2g81.jpg)
How do I know which one is genuine on SM-RT66 rotors? One says made in China (SK) while other says Japan (RA). Both has different edges. Please confirm. Got china one from
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シマノ(SHIMANO) SM-RT66-M ディスクローター 180mm ISMRT66M(未使用品)の通販はau PAY マーケット - GoodLifeStore | au PAY マーケット-通販サイト
![Shimano Deore SLX SM-RT66 Disc Brake 6-Bolt Rotor 160mm 180mm 203mm MTB – I.E.T. INDUSTRIAL ANTONIO PRIETO – SINCELEJO, SUCRE Shimano Deore SLX SM-RT66 Disc Brake 6-Bolt Rotor 160mm 180mm 203mm MTB – I.E.T. INDUSTRIAL ANTONIO PRIETO – SINCELEJO, SUCRE](https://i.ebayimg.com/images/g/GWQAAOSws4RiAd2n/s-l1600.jpg)
Shimano Deore SLX SM-RT66 Disc Brake 6-Bolt Rotor 160mm 180mm 203mm MTB – I.E.T. INDUSTRIAL ANTONIO PRIETO – SINCELEJO, SUCRE
![Amazon.co.jp: Shimano SM-RT66 M Disc Rotor, 7.1 inches (180 mm), 6 Volt Specifications, Silver : Sports & Outdoors Amazon.co.jp: Shimano SM-RT66 M Disc Rotor, 7.1 inches (180 mm), 6 Volt Specifications, Silver : Sports & Outdoors](https://m.media-amazon.com/images/I/51IU7gvIDXL._AC_UF1000,1000_QL80_.jpg)