It's an 18" x 24" giclée print on matte enhanced paper 192 gsm, Thickness 10.3 mil
with Epson Ultra Chrome K3 inks, and is in a hand signed and numbered limited edition of 50 and costs $40.
I've already featured his more well known Barsoom/John Carter art and Warlord Of Mars comic book covers before, but here's a selection of his other work. More examples of Joe's art
after the jump, as always, click to embiggen.