Based on my observations, this rubber valve stem is the real deal... It made a marked difference in the tire pressure and handling of my car. The rubber compound used for this product is high-quality and has a long lifespan that can withstand extreme weather conditions. The installation process was quite easy and it fits perfectly without any hassle. The only downside is that it is a bit pricier compared to its counterparts, but it is worth every penny for the quality and durability it offers. Overall, a great investment for any car owner looking for a high-quality valve stem..