The Iver Johnson 20GA choke tube is a dependable steel extended choke designed for 20-gauge shotguns, offering an Extra Full choke that concentrates shot pattern for long-range precision on game or clays. Crafted to a robust 0.85 x 0.85 x 3.95 profile with Mobil thread pattern, this choke tube pairs durability with reliable fitment across compatible shotgun barrels, ensuring consistent performance under field and range conditions. Engineered for extended use, it delivers a balanced density of shotshell performance, helping you maximize pellet concentration at distance while maintaining smooth cycling and bore alignment. The steel construction withstands rigorous use, recoil, and the rigors of hunting and practice, making it a practical upgrade for shooters seeking tighter patterns without compromising reliability. Whether youre pursuing upland birds, waterfowl, or precision clay targets, this choke tube from Iver Johnson integrates seamlessly with existing shotgun setups, enabling you to tailor your choke selection to the environment, ammo, and shot distance for improved hit probability.