FD-LOK needle valve rincludes 10 series, ranging from 6k- 10k psi. Our products are interchageable with Swagelok's We can make needle valves in SS316, 316L, inconel, monel, hastelloy, super duplex etc. We also have needle valves from 15k to 60k psi. Please refer to our high pressure series. My email: olivia@fangdun.com