Cactus Flow Product’s Adjustable Choke assemblies are furnished with Hardened alloy steel stems and seats as standard trim for regular or standard service. Stainless steel or stainless steel with tungsten carbide trim sets for abrasive and or Sour Gas Service are available on request. Positive Choke assemblies are furnished less flow bean. Positive choke assemblies may be converted to Adjustable Choke assemblies by replacing the blanking cap assembly and flow bean with the appropriate adjustable bonnet assembly and seat.