https://www.crconline.com/itemdetail/AN-23B
AN-23B 90A Carboxilated Nitrile Wiper Ring | 2 1/4 in ID 2 9/16 in OD
AN-23B Wiper Ring | AN Style | 90A Durometer | Carboxilated Nitrile Material | 2 1/4 in Inner Diameter | 2 9/16 in Outer Diameter | 3 ft/sec Speed