Four: Finish and Install

There is a metal grate/wire mesh that holds in about 300 lbs. of lava rock.
The space between the two halves is 10 inches (25.4 cm).
A cooking wok is placed in the center to hold a wood fire. There are a few air holes drilled in the bottom of the wok.

If you are careful when removing the form to avoid chipping, denting, or scratching it, you should be able to cast many times with this single form.