... ~15000psi Product specification level PSL1~PSL3 Material level EE,FF Choke manifold Choke manifold is necessary to control well-kick & blowout and ... control,The manifold is matched with barrel choke valve that is required to be orifice choke valve in case of stop function ... 1/16”StandardAPI16C &16AMaterial classAA,BB,CC,DD,EE,FF API Choke Manifold