This listing is for a pair of solid 14k yellow gold standard butterfly friction backs. These backs are stamped 14k and made to fit OUR gold earrings. The backs are created to fit our gold earrings posts. These backs are sold in pairs. There are two variations of these butterfly backs. The first (shown in the photos) are the standard size usually best suited for small earrings. The next size is the larger (more sturdy) size backs which are better suited for larger size earrings (i.e. 7mm and above). 1-EB-14YE-PB.