Generic Roland XC-540 / VP-300 Big Damper with Big FilterPrinter Compatibility: Roland VP-300 / VP-540 / XC-540 / XJ-640 / XJ-740 / RS-640 / Roland SJ-640 / SJ-1000 / SJ-1045 / LEJ-640 for pson DX4 / DX5 HeadManufacturer: OEM Pack of 10pcsInk Type: For both solvent / eco solvent and water-based ink. Net Weight: 5gProduct size: 54mm x 50mmx 12mmTo prevent your print head clogged, you should replace these dampers frequently. The frequency of replacement is set based on the workload of the machine