Metal: Yellow Gold Frontal/Design: 3mm/3mm Gauge: 16 Post length: 8mm and 6.5mm (originally came with 6.5mm but I bought the 8mm because I needed a longer post). I retired my rook so didn’t get to use these pieces much. Selling bc I won’t re-pierce my rook. I will package items in the Maria Tash box that usually comes with their jewelry! Also included in the pricing is this 16g 8mm 24K PVD Rook barbell from Invictus Body Jewelry which I originally bought for $70 but never really got to use.