The Gold used in this Piece is Totally Nickel Free, and available in either; solid 14K Yellow Gold, or solid 14K White Gold.
These are also available in the Straight NoseBone Style (not pictured). This is the Straight Post with a small ball on the other end to keep the piece in place. Unbelievably easy to use. Just pop it in and out of your piercing in less than 1 second. Also available is the L-bar which is also very popular, and the unbent Fishtail.