This Seiko SPT-255 Damper is suitable for printers using Seiko SPT-255 Print Heads. This high quality damper is usually only supplied together with the print head, but we make it available to you as a stand-alone item so you can extend the life span of your SPT-255 print heads. This damper includes a top quality o-ring on the outlet side to ensure proper sealing between the damper and the printhead.