I googled Gear Alloy and found their website, but no specs. Waynes Wheels was listed as a dealer, but no specs there either. The "Double Pump" is HOT! If it came in a full polish I'd try harder to find them. I just can't see black or black combo wheels on my Majestic Blue. Others have done it. I guess I'm just too picky. Post if you find specs though as I'm always curious.