This Set of 12 Glass Spice Jars w/Black Caps, by Kamenstein, are constructed of clear glass, with black plastic caps, making it easy to see when your spice needs to be refilled. Caps include a sifter disc for spices. They’re also a great to use for crafts or office supllies and an economical way to package small gifts of homemade spice blends or teas for gift giving. Spice jars will fit most Kamenstein Spice Racks. Set of 12 glass canister spice jars, each measures 3-1/2 inch high x 1-3/4 inch diameter and holds 3 ounces.