Small brass nose cone was made for an old design Radiosonde. Size about 1.62" diameter x 1.50" tall. Has 0.22" diameter round at top and 2 small rectangular holes in base. New old stock. Weighs 0.30 ounces each. Sold in a package of 2.Customer Feedback: This is really a part of an unfinished disk cone antenna. They radiate a pattern that is nearly a perfect half sphere and are used for sending signals when the orientation of the antenna cannot be assured such as from a weather balloon.