These end caps are hand carved from engineered stone - Turquoise. This stone turquoise blue with dynamic black veining running through the pattern. The pair pictured have a 8 mm opening, but this item is available in virtually any size. If you need a size not listed here, just let us know - we can make it.
Each end cap is approximately 3/4 inch long and the closed end has a 1/8" hole (large enough for several threads to fit through).