AeroGain Custom Mono Arm RestAeroGain Custom Mono Arm Rest Seamless, clean front end design, with the possibility of integrating armrest and BTA (between behind the arms) bottle mount. High supporting sides for increased comfort and ease of maintaining an aerodynamic position. Customised to your specified width, and mounting system compatible with all standard aero extensions *This does not include the BTA mount. For that choose the product together with BTA spacers, or add