This tube fits the following guns:
Benelli 20ga Nova Pump
Beretta 20ga 3901
Beretta 20ga 471 Silver Hawk
Beretta 20ga 686 White Onyx
Beretta 20ga 687 EELL Diamond Pigeon, Sporting
Beretta 20ga 687 Silver Pigeon II, III, and V
Beretta 20ga AL391 Teknys Gold, and Gold King Ranch
Beretta 20ga AL391 Urika 2 Gold, X-TRA, Youth, Sporting
Beretta 20ga Silver Pigeon S King Ranch and IV King Ranch
BSA 20ga
Charles Daly 20ga Model 106
Charles Daly 20ga S/S Field II
Franchi 20ga
Franchi 20ga 48AL
Franchi 20ga Fenice
Franchi 20ga Instinct O/U
Mossberg 20ga SA-20
Smith and Wesson 20ga 1000 (Current version starting in 2007, made in Turkey)
Stevens 20ga 512 Gold Wing
Stoeger 20ga M3020
TR Imports (TRI) 20ga Silver Eagle
Traditions 20ga Semi Auto
TriStar 20ga Raptor
TriStar 20ga Viper
Weatherby 20ga PA 459
 
20ga Benelli/Beretta Mobile Anaconda Striker 0.570
 
Patternmaster Anaconda “STRIKER” (0.570”) has “Gas over Constriction Technology” within the patented “Coil Zone” made up of internal channels used to harness gas expelled from the ammunition. “Coil Zone” channels are spun in a negative twist to stabilize the wad for even, consistent patterns and keep the tube tight in the barrel. Anaconda “STRIKER” will throw an Extra Full pattern with distances out to 60 yards. This tube is safe and effective with non-toxic shot as well as lead. 
Note: Testing done by Ballistics Performance has determined that ammunition with velocity of 1550fps and below will achieve the best results with Patternmaster Tubes.
Not for use with slug ammunition.
NOT FOR USE WITH STEEL SHOT