Thin flange on ebay

[Steve Swan]

looks like a thin (2nd type) flange to me. 

http://www.ebay.com/itm/69-78-CB750-SANDCAST-EXHAUST-HEADER-FLANGE-MOUNTS-SOHC-CAFE-RACER-18236-300-030-/230793160211?hash=item35bc582613&item=230793160211&pt=Motorcycles_Parts_Accessories&vxp=mtr