The Browning Standard Invector Flush 16 Gauge Improved Cylinder choke tube is a reliable and precision-engineered accessory designed for Browning shotguns. Manufactured from durable 17-4 stainless steel this choke tube ensures excellent pattern uniformity and is built to meet industry constriction standards. It is specifically crafted for shotguns compatible with the Standard Invector system and is not suitable for models marked with Invector-Plus or Invector-DS on the barrel. With a constriction diameter of .010 it is perfect for shots up to 30 yards and is approved for use with steel lead and non-toxic shot. The flush design seamlessly integrates with your shotgun offering a sleek and functional finish.