The valves are the upgrade designed to fit Roundhouse live steam and other quality manufacturers using the (Ronson) M4.5 mm OD thread / 0.5 pitch.
The valve has been upgraded to give a cleaner fill by giving better venting than the old type valve.
Each valve comes with a nitrile sealing ring fitted.
Free UK post. International Subsidised £2
Your feedback would be appreciated on receipt, so I know your package has arrived OK
Thank you
Pay Pal preferred please.