The Browning Invector 20 Gauge Cylinder Choke Tube is a precision-engineered accessory designed for superior shot pattern performance. Crafted from durable 17-4 stainless steel this choke tube ensures long-lasting reliability and excellent uniform densities in your shooting patterns. Specifically made for Browning shotguns with standard Invector configurations it is not compatible with Invector-Plus or Invector-DS models. This flush-style choke tube is approved for use with steel lead and non-toxic shot making it versatile for various shooting applications. With a constriction diameter of .000 and an optimal range of 20 yards it delivers consistent results for close-range shooting. The sleek stainless finish enhances its durability and adds a touch of sophistication to your shotgun. This choke is a must-have for shooters seeking trusted performance and quality.