Review on UREMCO 6 4 Fuel Injector Seal by Antoine Cash

My car is a '93 Civic with a D16z6 engine. The gasket between the intake manifold and the injector is nowhere near as thick as it should be; they are approx. 3 mm shorter than the original. I had to use the old ones. The attached picture shows the new one on the left and the old one on the right. I should also note that I don't think spigot caps on atomizers are user-replaceable; They get stuck in there and when you try to unscrew it it breaks and the old cap's tiny ring gets stuck in a groove you can't get out. So I couldn't/didn't use needle caps.