This is a pick roller unit made by Cavers, specifically for the ScanSnap series and fi series scanners. Compatible models: ScanSnap series (S1500 / S1500M / N1800) fi series (fi-6110) Replacement guidelines: * Every 1 year of use * Every 100,000 scans Replace consumables when either the number of scans or the usage period is reached. Management number: 12-43 #mai♪