Stan's Tubeless Universal Valve Stems That's a Lot of Valve Stems The original tubeless valve stem - most rims and a perfect fit for all Stan's BST rim models. Durable brass construction with a removable valve core makes adding sealant easy. Features Available in 44mm and 35mm Durable brass construction with a removable valve core Fits most rims and is a perfect fit for all Stan's BST rim models | Stan's No Tubes | Stan's Tubeless Universal Valve Stems | Brass | 44Mm 25 Pack