The link still works for me with the Chrome browser. I never use ie any more.
Just tried the link again. You can call them, they are super customer friendly.
I ordered the brass, they actually sent me the higher cost chrome, which was nice.
I emailed a question to make sure I got the right ones for my chassis, and they called me to discuss the chassis. They were right on.
Just make sure you order the right valve stems for your chassis. They can help if you need to ID the stems for your purpose.
Good Luck and you're welcome.
obtw, if you do access their website, they have a pdf file chart that outlines which valve stems are designed for a specific chassis.