Trulock Precision Hunter Browning DS 16 Gauge Turkey .625 Black Small. Choke tube is marked clearly on the end of the choke tube with a red tru-lock logo and the degree letter/number on the body of the choke tube indicates the actual speed at which the choke tube is working. A choke tube's performance is directly proportional to the number of "holes" it has. The choke tube is backed by a limited lifetime warranty however; if the choke tube ever wears out from normal use the manufacturer will replace it at no charge to you. Specifications for Trulock Precision Hunter Browning DS 16 Gauge Choke Tube: Manufacturer: Trulock Color: Black Finish: Black Fabric/Material: Steel Gauge: 16 Choke Tube System: Browning Invector DS Gun Make: Browning Quantity: 1 Condition: New Package Contents: Trulock Precision Hunter Browning DS 16 Gauge Choke Tube Trulock PHDS16605: Precision Hunter Browning DS 16 Gauge Turkey .625 Black Small