Tree Caps are installed on the top of X-mas Trees for quick access to the tubing bore via a tester or lubricator adapter for bottom hole testing, installing back-pressure valves, etc. The bottom hole test adapter allows a flexible means of entry into the tubing bore. Bottom hole test adapters are used where an integral flanged unit is preferred. These adapters are furnished within the size range 2.1/16″ to 7.1/16″ and working pressures up to 15,000 psi. OTIS type tree caps are most used. Bowen type is also available upon request.