Hands down the best value for 26" tubes out there. Sure, there are cheaper ones to be had, but I'd rather be riding than fixing flats. Never had one fail right out of the box like some of the cheapies I've tried in a pinch. Just not worth the meager savings. Stock up when they go on sale. Can't miss with these.
These are quality inexpensive tubes. The valve stem is threaded all the way to the base and there is a nut that goes over the threads. This gives you the ability to secure the valve stem in place making installation incredibly easy.