This attractive wood diffuser bottle cap has a silver metal band on the top. This helps to protect the wood cap from absorbing the oils that have seeped up the diffuser reeds. The reeds rest against the metal band with out staining the cap. A nice clean sleek look. They fit all of NuScents reed diffuser bottles. (NOTE:)No guarantee that they will fit other bottles on the market. Some may be snug fitting. While applying to bottle, put a little twisting action into it.
Overall height = 1 x 3/4 inches
Diameter of top = 1 x 5/8 inches
Diameter of top opening = 3/16 inches