Valve self wash, stainless steel needle guide with seal, pump, solenoid valve manifold, timer box, when no Cruise Control feasible (for handhold operation, Sciex MAC and PC Analyst users) Standard configuration accommodates one 6-port injection valve. A special configuration to accommodate one 10-port injection valve is available for an additional $50.00. Uses Chemsure tubing for longer lifetime and better solvent compatibility.