More informationRear coupling to fix an adjustable rear hydration system on the saddle rails. The modular structure with multiple mounting holes allows different fixation possibilities and orientations. Modular construction to regulate and configure the distance from the saddle and the possibility of attaching up to 3 accessories (2 bottle cages + the Birzman repair kit*). This coupling also serves to attach a single bottle cage to the rear. *Repair kit: (1 x E-Grip valve adapter, 2 x 16 g cartridges, 1 x velcro strap). Material: 6061 aluminum. Measurements: 170 x 72 x 68 mm. Weight: 105 g. Includes: adapters to mount it on 9mm carbon rails.