Iver Johnson Choke Tube Features The Iver Johnson Choke Tube is machined from stainless steel a material chosen for its resistance to corrosion and wear after repeated exposure to shotshell residue and field conditions. Its improved cylinder constriction produces a wider shot pattern than tighter chokes making it a strong choice for close range shooting situations such as flushing upland birds or close-range clay targets. The extended design makes the choke easy to grip and install or remove by hand without needing a separate choke wrench for basic changes. Built on the widely used Mobil style thread pattern this choke tube fits a broad range of shotguns that share that threading standard. Shooters who frequently switch between different shooting disciplines appreciate having a range of chokes on hand and this improved cylinder option rounds out a lineup well suited for closer range work. The stainless steel construction also resists the pitting and rust that can develop in choke tubes exposed to high humidity or frequent cleaning with solvents. Because it uses the Mobil thread pattern hunters running Iver Johnson or compatible shotguns can swap this choke in quickly before a hunt or competition. The Iver Johnson 12 Gauge Improved Cylinder Choke Tube is available now at GrabAGun for shooters who want a reliable option for close range shooting. Iver Johnson Choke Tube Specifications Manufacturer: Iver Johnson Type: Choke Tube Choke: Improved Cylinder Flush or Extended: Extended Gauge: 12 GA Material: Stainless Steel Thread Pattern: Mobil Available At: GrabAGun