Black Braided Cable Management Sleeves Wire Loom Tubing Cord Protector Self-Wrapping (1/2"-20Feet)

Need to use (4) #4 insulated wired to make 60 ft. Extension Cord for exterior Construction ??

Can you cut this product down to a smaller size?

Is this loom self-extinguishing?

In practice, what are the benefits of the tigher weave of this product when compared to the more open weave of other wire looms?