Parts to refill dealer kits or to be used as needed- Universal fit, one valve for all types of rims- VersaValve alloy Presta valve stems have large sturdy bases that ensure solid contact with the rim bed- Valves include two different types of grommets, conical and square for ideal, airtight fitment- No third-party sales on Amazon, Walmart, or eBay are permitted. Please direct inquiries to [email protected]