Taylor Target Pro-Series Gong. Pro-Series Gong is 10 diameter and comes with the chains and frame to fit the Taylor Targets Pro-Series Base sold separately. The Pro-Series Gong is rated for .22 rimfire through big bore rifle. Pro-Series Gong MUST be used with the Taylor Targets Pro-Series Base . Product Specifications 1-10" Gong, chain and frame .22 Rimfire-centerfire hanguns/rifle caliber Materials: Heavy-Duty AR500 Steel