This die extrudes a fluted shape. The inner shape is a smooth circle. The die is compatible with 4" round Scott Creek clay extruders.
The inner diameter of the extrusion is 77mm (3"), and the maximum width of the outer shape is 92mm (3 1/2"). The minimum wall thickness is 4.6mm (~1/5").
Overall dimensions of the die are 4 1/2" in diameter