The Smittybilt rear window gas struts (P/N 519701-11) have failed (on the Smittybilt hardtop on my Wrangler ). I could not deliver this item to my city. They were perfect for their location, were a lot cheaper, and could ship to my town. I didn't even have to replace the fasteners: they snapped straight into place. The extension is about 1/2 inch more than the original, which doesn't seem to matter.