グラフテック(GRAPHTECH)Graphtech Tusq Xl Sleek String Tree With Chrome Screws, PQL-7004-00

Could someone describe the difference between the two colors? The photos look exactly the same to me. Thanks.

Are these as good or better than rollers?

Why only one short screw? Why wouldn't you include 2 of each

Why the black version has international shipping but this version don't?