This tube fits the following guns:
Benelli 12ga 828U
Benelli 12ga Cordoba (2011 to current production)
Benelli 12ga ETHOS 
Benelli 12ga Legacy
Benelli 12ga M2/M2 Tactical
Benelli 12ga Montefeltro (2011 to current production)
Benelli 12ga Sport (2011 to current production)
Benelli 12ga Sport II (2011 to current production)
Benelli 12ga Super Black Eagle 3
Benelli 12ga Super Black Eagle II 
Benelli 12ga Super Sport (2011 to Current production)
Benelli 12ga Super Vinci
Benelli 12ga Ultra Light
Benelli 12ga Vinci
Beretta 12ga 686 White Onyx Sporting
Beretta 12ga 687 EELL Diamond Pigeon Sporting
Beretta 12ga A391 Xtrema2 (Synthetic, MAX-4, AP)
Beretta 12ga A391 Xtrema2 KO (Synthetic, MAX-4, AP)
Beretta 12ga AL391 Teknys Gold
Beretta 12ga AL391 Teknys Gold King Ranch
Beretta 12ga AL391 Urika 2 AP, Synthetic, MAX-4
Beretta 12ga AL391 Urika 2 KO (Synthetic, MAX-4, AP)
Beretta 12ga AL391 Urika 2 X-TRA Grain
Breda 12ga Grizzly
Breda 12ga I930
Franchi 12ga I-12 Sporting (Current Production)
TriStar 12ga TSA Mag 3.5 inch chamber (no longer in production)