O-ring sizing help....

[faberjay111]

Hi guys,

I need some help! I would like to buy O-rings for my 243 from this ebay seller.....http://stores.ebay.com/POLLARDS-WAT...50166010&_sid=201839170&_trksid=p4634.c0.m322

What size should I get? Do all the Pams have the same size O-rings?

Thanks in advance....