Two piece set of Presta dual head air pump adapters for bicycle tires Durable and reliable: Made of durable materials to provide long lasting performance during cycling adventures Easy to attach and use: Compatible with most track pumps that have a head; attaches quickly and securely without tools for efficient inflation Dual valve design: Dual valve head allows effortless inflation of Presta tubes; provides a secure connection for road bike tires and other Presta valve applications Compatibility: Works with track pumps with a head and is designed to fit Presta valve tubes What's included: 2 piece replacement pump heads Practical applications: At home or in the garage to up road bike tires with Presta valves using a standard track pump On the go during rides or trips to quickly inflate Presta tubes with a compatible pump In a bike or workshop for servicing Presta valve tires and tubes Performance and reliability: Built to maintain secure connections and reliable inflation across multiple uses