I have worked with automotive and avionics electronics and wiring for over 10 years and it has never taken 40 minutes to thread a single 16 gauge wire through heat shrink tubing. The amount of creases and flat spots make it totally UNsuitable for anything over 8 inches. Reinforce the "double" walls to maintain their shape to allow for longer cable runs, charge a few extra bucks and you'll never see a rating below 4 stars.
Good 12674 Rubber 50 Feet 8 Inch
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