African oryx, gemsbok horns measuring approximately 31 inches on a skull plate, cap measured with a cloth tape measure (skull cap has some cracks in it). Gemsbok or Oryx is a large antelope found in the arid regions.  One or both of the horns is removed for shipping.  They are easily re-attached.
This skull plate was imported from South Africa and has been cleared for legal entry into the US by the US Fish and Wildlife and US Customs.