Application:  Any complex profile or a simple channel or tube.

Part design:  Avoid multiple enclosures. Reduce mass where possible. Uniform walls are key.

Thickness:  Ideal wall thickness is .060 to .080  Thicker walls up to .150 can be extruded.

Tolerance:  The more generous the tolerance the faster the line speed resulting in cost savings.

Material:  Select the correct material for your application. Some materials process easier than others.