Zipp's Vuka Clip Risers are designed for use with the Vuka Clip’s above-bar option. The risers are designed offer a wider range of adjustability within the Vuka aero-cockpit system. The Vuka Clip Risers are available in three sizes: 5 (8g), 10 mm (38g), 25 mm (70g) and 50 mm (120g). Each size of risers is sold separately in packs of two. Risers cannot be stacked. Risers can be used on the above-bar system in 5, 10, 25, and 50mm heights to achieve proper positioning. FEATURES: Fit, security and adjustability For above-bar mounting system SPECS: Length: 50mm