I keep these in my kit and they take up almost no space. Duct tape can fix a lot, I consider this a crucial item in my go bag.
Perfect size for backpacking. Duct tape can fix many things so it's a no-brainer at less than an ounce.
Ignore the Tech specs, not 50ft but 50in.
The description talks about what you can do with "50 feet" of duct tape in your pack. While true, the rolls they are selling contain 50 INCHES each, NOT 50 feet. Both rolls (2 per package) combined would yield 100 inches, or 8.33 feet.