Stan's Universal 55mm Valve Stem Pair

Stan's California Proposition 65 

https://cambriabike.com/pages/warning-california-proposition-65

The original and still the best tubeless valve stem for most rims and a perfect fit for all Stan’s BST rim models.

• Weighs 21g per valve
• Durable brass construction
• Removable valve core makes adding sealant easy
• Fits up to 8mm valve hole
• Sold as a pair