This Gilson 819 Injection Module Valve Actuator with Partial Rheodyne 7010-090 Valve is in good condition and with the addition of a complete valve is guaranteed to be in functional condition with a 30 day full money back return policy. This item came from a local lab that had surplus inventory and shows slight signs of normal use. As seen in photos the Rheodyne 7010-090 valve is incomplete. This issue us reflected in list price. We urge customers to view all photos as they show overall condition, included accessories and functionality. Please feel free to contact us with any questions. The 819 Injection Module enables you to inject samples onto Gilson's 215 Liquid Handler. The module contains a high-pressure, two-position switching valve that can also be used for fraction collection. It is an effective way to collect fractions when the flow rate is higher than 20 mL/min. Carryover is less than 0.01% Ideal for analytical to preparative injections Make-before-break rotor seal design prevents pressure spikes from injection when operating at high flow rates