Check the listing for details. Zipp QuickView TT Computer Mount, 22.3mm, Quarter Turn/TwistLock. Color: Black, Condition: New. Listed at 22.78 USD. The QuickView delivers an uncomplicated computer mount that's easy to install, lightweight and, vibration and slip free. 22.3mm industry standard quarter-twist mount installs simply and securely on aero extensions. Aerodynamically shaped for left-side installation, but can be installed on the right bar extension as well. Includes single Torx T25 bolt and flexible mounting clamp. Note:this will only work with 1/4 turn compatible mounts 500 and 800 series - you will need the adaptor for older slide mounts 600 & 700 series. SHIPS TODAY! Order before 1:30PM EST, M - F, and this item ships the same day! HAVE A QUESTION?Expert customer service by bike experts! A Real Brick And Mortar Retail Bicycle Shop with people you can talk to! Contact Us! (9-5 Mon-Fri, 12-4 Sat & Sun EST) Chat With Us