Standard configurations of surface test trees are available. These typically consist of swab, upper master, production, and kill line valves.
Designs are also available with the lower master valve located beneath the swivel. Surface Test or Well Intervention Trees come in sizes from 3" flow-bore and 5,000 psi working pressure up to 7-3/8" and 15,000 psi working pressure, and temperatures from -50°F to 400°F. A 3-1/16" 20,000 psi version is also available.