The Browning Standard 12-GA Improved Modified Flush Tube is a precision-engineered choke tube designed to deliver exceptional pattern uniformity and performance. Crafted from durable 17-4 stainless steel this choke tube is built to last and meets industry constriction standards for reliability. Specifically designed for Browning shotguns with Standard Invector compatibility it ensures a seamless fit and optimal functionality. The improved modified constriction offers a constriction diameter of .025 making it ideal for shots at 50 yards. Approved for use with steel lead and non-toxic shot this flush tube combines versatility with top-tier performance. Its sleek stainless finish adds a touch of durability and style while its non-ported design ensures a clean and efficient shooting experience.