Description Manuals Videos Articles Clemco 21438 - Sentinel Metering Plate, Urethane (Fine Abrasive) Fine mesh, Urethane, 50 mesh and finer Sentinel Valve Number 11 Customers Also Viewed Sentinel Metering Plate and Stem (Course Abra… #20499 $65.96 Sentinel, Flange Adapter w/ Inspect Plate #20513 $53.35 Sentinel, Flange Adapter w/o Inspect Plate #20522 $75.66