Silver-filled components start as a base of brass, which under heat and pressure, are bonded with solid sterling silver. In the case of 1/10 components, there is a layer of .925 sterling silver which is at least 1/10th the total weight of the piece.
When Silver was at $40/ounce, Silver Fill was a great substitute. Now the extra work involved in making Silver Fill makes it more expensive. As these products sell out, we will discontinue as our suppliers are no longer making the Silver Fill.