I recently purchased a pack of valve stems and was pleased with my choice. Thanks to my knowledge gained in practice, I knew to choose rubber stems over metal ones. These valve stems are durable and easy to install. Plus, they come in a pack of 100 which means I have plenty to use and share with friends. The only con is that the snap-in feature could be a bit tighter, but it's not a significant issue. Overall, a great value for the price!