The SRI Adjustable Choke is a monogrammable API 6A choke rated for working pressures up to 15k psi. Available in all standard API sizes from 1-13/16”- 7-1/16,” PSL 1 – 3, and connections as requested by the customer, our adjustable choke features a seat and a manually adjustable needle allowing for variable orifice sizes for precise flow control.