This roller assembly kit, part number B12B819031, is designed as a replacement component to restore functionality in compatible paper handling equipment.The set includes rollers intended for direct installation in units matching the following models: ES-400, ES-500, ES-865, DS-530, DS-570, DS-575, DS-770, DS-780, DS-870, DS-970, and FF-680W.This accessory serves to replace worn or damaged rollers, ensuring the device operates according to its initial specifications.Compatibility is limited to the specific model numbers listed.