The window in Geronimo is called a LeVan Flex Thru window - it is made out of tempered glass and both sides bend out from the middle. It was made back in the 83-84 timeframe for all the popular mini trucks. It was pulled from the market because it broke very easily if not handled very carefully. Mine sat on a shelf for years because the frame was not made right to fit the window opening - I had to build the lower corners out 1 1/2" and radiused to match the stock window to get it to seal. I put it in because Mini Truckin said if anyone had a truck with one installed, they would do a feature on it. So far, the main editor has changed twice, and I still can't get them to even look at Geronimo when they're at a show I am at. I will post more pics of it once the temperature stays above 40 degrees so I can open both sides at the same time. It is also supposed to be able to be removed completely, but I couldn't get it to slide like it should, so I left it alone. It's one of many old skool mods and parts I accumulated over the years.