Hot Box

Begins as a thin crack for about 20 feet. Where it peters out is the technical crux. The pumping crux comes in 1 1/4" crack leading to top.

On the right side of the same wall as "Grease Monkey" (5.9) are three parallel cracks: "Pressure Vessel" (5.10c), "Hot Box" (5.11d) and "Air-Cooled Unit" (5.11a). "Hot Box" is the center crack.

1/2" to 3.5"