Abstract: A dispenser cartridge containing two components of a two component system wherein the two components have substantially balanced degrees of compressibility, and in a predetermined ratio, the cartridge having co-axial inner and outer chambers containing the respective components, pistons moveable along the chambers for ejecting the respective components, a dispensing end wall extending transversely of the chambers, an elongated valve body formed on the outward side of the dispensing end wall having a transverse valve recess, first and second dispensing openings in the dispensing wall communicating with the inner chamber and outer chamber, a boss formed in the valve body located along the central axis of the inner chamber and having two dispensing passageways, with a partition wall to keep the two components separate, first and second valve openings extending between the valve body and the boss, communicating with respective passageways, a valve plug member received in the valve recess, first and second conduit