1" OD, 0.120 wall mild steel. They'll need paint, chrome or powdercoat, or leave as they are for a crusty patina!
29" width 9" rise 9" pullback 6" clamp area (will work with standard 3½" spacing, or springers) 7½" grip area
The first photo shows how they look on my softail bobber, with 4" risers. They are incredibly comfortable with no wrist ache at any speeds. The bars you are buying are brand new, never installed, un-drilled with no knurling or dimples.