Bambusa Lako Timor Black Bamboo - Clumper.
50 feet tall, culms 3.5 inches in diameter.
Purple-black culms striped faint green. Similar to G. atroviolacea. Has branches on lower part of culms. Cold hardy to about30F.

Moso Bamboo - Runner.
75 feet tall, 7 inch culms and cold hardy to zero F.
Largest of the hardy bamboos. Young culms are covered with a velvety coat of soft hairs.

BAMBUSA BAMBOS - Clumper(Has Thorns on it so be careful).
100 feet tall, 7 inch diameter culms. Fast growing, thick-walled, soft. Lower branches are long, wiry and armed with thorns. Cold hardy to about 28F.

I don't grow and know nothing about "IRON Bamboo Plant".

Kt

Sam-
Just some friendly advice. Bamboo on eBay are often sold by people who know very little about digging, stabilizing and proper shipping of bamboo. The prices may look good, but you may end up with only non-viable rhizomes or with a plant that dies on you. Other people sell bamboo seeds that are improperly identified, and are, in any case, illegal to bring into the country without a quarantine permit. Further, if they are not confiscated, they will still take years to produce decent size bamboo...and that's if they are viable and you can get them to sprout. Don't mean to sound too negative, but I've seen too many paople get bad deals on eBay with the bamboo sellers. They're not all bad...just a lot of them! Good luck, and be cautious.

thanks for the advice, 3 out of 4 looked pretty good. 2 of them had some tenders starting to sprout out of the root system.