Valve seal 200 head

Anyone know a part number for 200 six teflon valve seal? I believe the shaft is 5/16 and .500 OD.

where are you ? if your in the states you can get K-line steelgrip teflon stem seals ...p/n KL1401 (BOX OF 16 ) .

cheers Dave .

where can I buy them from Dave?

Try any machine shop or try 1-800-824-k-line if your in the US and they might be able to put you in touch with a supplier near you.
where are you ?
ive got them on my shelfs at work but im all the way down in little ol NEW ZEALAND.
cheers dave