Our 6″ x 6″ Base, built out of SS 304. The standard end cap and tri clamp assembly of the certified MKIII makes it difficult to retrieve your oils. With our 6″ x 6″ base, you can easily recover your oils without all the mess of tri clamps, gaskets and end caps. The bottom is welded shut while the top remains open to allow for the MKIII lid. This base includes a 6″ high pressure clamp and a 6″ viton gasket.