Disk images are used for duplication of optical media including DVDs, Blu-ray discs, etc. Brakes were ventilated front discs and rear drums. Ventilated front, solid rear brake discs. There were several formats developed for recording video on optical discs before the DVD. The DVD contains all 25 episodes on four discs plus special features. Most bicycle brake discs are made of steel. JaguarSport designed the handbrake, which has separate calipers acting on the rear brake discs. It was released in a SteelBook edition containing the 3D/2D Blu-ray discs and the DVD. There had been two ruptured discs and a herniation. It featured 11.7" vented front discs and 11.5" rear discs brakes. Such albums have the certifications for the number of copies (not discs) shipped indicated. Brakes 2-circuit hydraulic power-assisted 4-wheel discs. It features 34 tracks on two discs. The console runs games supplied on Wii optical discs. Right crus arises from L1-L3 their intervertebral discs.