Extend your shooting abilities. These tubes are longer for a number of reasons. First, better patterning. Second, you can insert or remove them quickly with your fingers if necessary.  Invector-Plus extended tubes are constructed of highly polished, 17-4 stainless steel for the ultimate in performance and durability. 

Features:

• Knurled portion extends beyond the end of the barrel for easy removal and installation
  
• Longer choke taper inside Invector-Plus choke tubes for use with back-bored barrels
  
• Produces excellent patterns with uniform densities
  
• Set to industry constriction standards
  
• Threaded for 12 gauge Invector-Plus back-bored barrels only
• Choke Pattern Percentage 35%-65%