Due to a supply outage of Disc Plate PN 1076198. During this outage, we will offer a machined version of this Disc Plate PN 1076198M. The machined PVC version (gray) is fully interchangeable with the molded version (black). While the 1076198M is made from NSF-61 certified material, valve assemblies using the 1076198M are not NSF-61 certified. We are working diligently to get the molded shaft back into production.