Start of lstUrls_of_images_in_html_description Product Number: 11305 Browning’s premium extended choke tubes for your Invector Plus shotgun, featuring tactile gripping surfaces, easy to read caps, and super durable Titanium Nitride coating for long lasting corrosion resistant performance. Longer choke taper inside Invector-Plus choke tubes for use with back-bored barrels on 12 gauge shotguns Stainless steel barstock is heat treated prior to machining Titanium nitride surface 72HRC hardness for excellent wear and reduced plastic buildup Absolutely perfect concentricity for superior patterning Extends beyond the barrel for easy removal and installation Specifications Material: 17-4 Stainless Steel Colour: Titanium Nitride Pockets: Titanium Nitride Gauge: 12 Weight (average): 4.8 oz Sizes Cylinder – .740, #1130513 Skeet – .735, #1130593 Improved Cylinder – .730, #1130583 Light Modified – .725, #1130533 Modified – .720, #1130573 Improved Modified – .715, #1130563 Full – .705, #1130553 End of lstUrls_of_images_in_html_description