Features: brand new and high quality Premium material: The bicycle for valve extender is made of aluminum alloy& rubber & plastic material, really stable and durable. Simple operation: lengthen the Presta for valve, the bicycle for valve extender is easy to inflate the tires. Wide Compatibility: This universal tire for valve extension adapter is fully for various bikes. Nice appearance: Four colors available, 50mm 80mm optional,cool and fashionable. Satisfictory service:Contact us if you have questions,we will try to serve for you until you are satisfied. Specifications: Type:50mm/80mm Color:Black Gold Red Silver Note: Please allow 0-1cm error due to manual measurement. Make sure you do not mind before you bid. Due to the difference between different monitors, the picture may not reflect the actual color of the item. Thank you! Package includes: 1 Set/2 Set x Presta for Valve Extension Kit.