Manufactured from brass tubing with a nickel finish. Holds up to five boluses. The thumb ring and two matching finger rings are zinc die cast, the plunger is aluminum and all parts can be replaced. If required, the entire gun may be autoclaved or sterilized. The extracting head of the gun is rounded and polished smooth to prevent injury to the animal. Dimensions: 1-1/8" ID, 1-1/4" OD, 18" L.