No info on spokes, but those might have a proprietary spoke. Here's an
alternative for $272 when you consider their spring discount. You can also look around on their site if you want to try different combinations. These guys made the wheels I'm currently riding on and I've had no issues, and I've bought other stuff from them too. You might want to check your LBS to see if they'll come close on price. The open pro rim is a popular training rim, at least it was several years ago when I had to have a wheel rebuilt.