These windows are made of a special green tinted acrylic material that makes them appear to be glass. The green tint is barely visible when looking through the window, but very visible on the polished edges. The chrome plating is very high quality.
The windows were designed specifically to fit Vintage Speedster and are adjustable for any variations between Vintage Speedsters. They may fit JPS Speedsters, but I have not had a chance to try them on a JPS. They can be easily modified to fit other Speedster by drilling 4 new post mounting holes in the windows and mounting hardware.
The windows will also be offered on eBay for $300. It took me quite a bit of time and expense to have these made and I don't know if I will be making anymore when these are gone.
If you are interested in a set, please email me at vanatic99 at yahoo.com
Pictures here-----> http://kvan.hopto.org/Speedster/CruzinWindows.htm