Tektro Power Modulator Brake Power Modulator The Tektro brake power modulator replaces the existing cable guide tube on V-brakes and other linear pull systems. The modulation device reduces the chance of unintentional use of excess braking power, increasing cycling safety. The power modulator can be mounted on most standard linear caliper brakes, including V-Brake brakes. Specifications: Color: silver, red Gender: unisex Material: aluminum Brake type: caliper brake, V-brake, roller brake Contents: 6 Brake power modulators