product code B12B819681 refers to a Roller Assembly Kit for a wide range of popular, high-speed Epson WorkForce document scanners.
This kit is a required consumable maintenance item, essential for maintaining the paper feeding performance of the supported scanners
Designed for a large group of Epson WorkForce scanners, including those you listed and more: DS-530 II, DS-730N, DS-770 II, DS-790WN, DS-570W II, ES-500W II, and RapidReceipt RR-600W.