The extrusion capacity of the pug mill may be increased by the use of the clip-on expansion chamber. The stainless steel expansion chamber is 150mm (6”) diameter allowing the extrusion of wider cross sections than the above extrusion kit. The expansion chamber is not supplied with dies, but these may be home-made simply using plexiglass or plywood. The dies may be bolted or clamped onto the expansion chamber. See the image of the Super-twin on the top of the page, showing the expansion chamber being used to make 125mm (5") wide tiles.