More informationDESCRIPTION:The original and still the best tubeless valve stem for most rims and a perfect fit for all Stan's BST rim models. Weighs just 16g, 18g and 21g per valve respectively for the 35mm, 44mm and 55mm models. Durable brass construction. Removable valve core makes adding sealant easy. Fits valve holes up to 8mm. Sold as a pair.