Part No. QTHP-0014 HPGV, XHGV fine adjust vernier piston assembly, brass Replacement parts for hand pumps, calibration manifolds, nitrogen sources and volume contollers Features • Made in the USA QTHP-0014 Ralston Instruments Inc. | ralstoninst.com | Toll Free 800-347-6575 | Phone 440-564-1430 | Fax 440-564-1480