The Gefen CAB-DVIC-30MM is a 30 foot, Male to Male, DVI-D Copper Cable.  Gefen has the largest and most diversified selection of different length DVI and HDMI cables in the world. Any length from 1 foot to 1000 feet.

Copper Based DVI Cables
Copper based DVI cables are available in lengths 1, 3, 6, 10, 15, 25, 30, 40 and 50 feet. These cables are HDCP compliant

HDTV Resolutions Supported: The 1-30 foot cables are good for the following resolutions: 480i, 480p, 720p, 1080i, 1080p. The 40 and 50 foot cables are good for resolutions up to 1080i. With a DVI Repeater/Booster the 40 and 50 foot cables are good for resolutions up to 1080p.

Computer Resolutions Supported: The 1-15 foot cables are good for resolutions up to 1920x1200. The 25-50 foot cables are good for resolutions up to 1280x1024. With a DVI Repeater/Booster the 25-50 foot cables are good for resolutions up to 1920x1200.