Green Touch Industries Line Spool Rack w/Built On Cutter (Item#: XD105)

Will this fit a 3 and 5 pound spool?

We run a large 5 lb spool trimmer line. I checked the length dimension and is 9.2 inches. Will this rack hold my 9.2" long spool? Thanks

does it come with string or do I need to buy string seperate?

Will it mount to pipe top trailer?