One of Bison's premiere products is the patented Volcano™ snare, which features a conical, stave-constructed shell. The unique conical shape results in the use of a 14" batter head and a 15" snare head. The Volcano is available in maple or ash wood (subject to availability). NGU hoops are standard on the batter side with a traditional steel hoop on the 15" snare side (thus accomodating many standard snare stands). Alternatively steel hoops can be delivered on both sides.