New OEM DG-41543 Valve Head Assy

Also commonly referred to as a "damper".  This is an OEM Mutoh part, not a 3rd party knockoff.  This inlcudes the nuts, o-rings and plastic joints.

Compatible with:

Mutoh 1614, 1638, 1638W, 1638W, 1624W, 1628TD, 2628TD