Stock WGP ranger powertube in stainless. Powertube size is 10-32. These are meant to be used with the ranger hybrid cup / valve retainer seals that don't have a seal on the cup seal and the seal is embedded into the valve retaining screw. I often drill out phantom cups to 10x32 and use these on guns such as my redux. The tubes I have left are dirty from sitting and some have light wrench marks around flange from disassembly but all function fine. These are beefy.