This Bottle Stopper has a certified FDA 304 18-8 stainless steel tip with silicone o-rings that will protect your excellent wine, balsamic vinegar, olive oil, liquor bottles, herbs, or bath oil. The wood has been turned from exotic woods: Bubinga from Africa, Camelthorn from South Africa & Mozambique, and Zebrawood from West Africa. The woods are laminated and then turned to expose the beauty of the various grains of the woods. It is appx. 1 5/8" dia. x 4 3/8"H. It has a multi-layer acrylic finish that will protect it for years. It is NOT dishwasher safe. A card with information about taking care of wood and the name of the wood is included with the purchase.