T. C. Wear Parts for Extruder Sharp Tool - 20 ST are available with 136 mm long mouth pieces. Tun-Car India Ltd. Manufactures T. C. Wear Parts for Extruder Sharp Tool - 20 ST. Tun-Car India Ltd. Also manufactures Grooved Rollers, T. C. Knurled Rings, and Wire straightening checking gauges. T. C. Wear Parts for Extruder Sharp Tool - 20 ST come with 131 diameter X 12.5 mm knurled rings. It is also available with 15 X 20 mm & 20 X 20 mm extrusion dies.