The Black Mamba is arguably the world's most deadly snake, highly lethal with incredible striking power. The new Patternmaster Black Mamba tube lives up to the legacy. Using our patented Coil Zone technology the Black Mamba was designed to bridge the gap between our Anaconda Long Range and the Anaconda Stryker tube. The Black Mamba is for hunters looking for the tightest pattern possible at insane distances while still being able to shoot Lead, Steel, and other Non-Toxic shot including TSS Blends. The Black Mamba has changed what we thought was possible with constriction tubes. 12ga .690 Constriction 20ga .590 ConstrictionNOT FOR USE WITH SLUG AMMUNITION Patternmaster Order Codes (11) 12ga Benelli SBE/M1/Nova Beretta Urika (12) 12ga Benelli SBE II & III/M2 Vinci/Super Vinci and Beretta Xtrema 1&2/Urika2 (14) 12ga Browning Invector Plus/Winchester SX2-4 Maxus 1&2 (20) 12ga Browning New A-5 (21) 20ga Benelli M1 Super 90 Stoeger M3020 Benelli Nova (22) 20ga Benelli M2 SBE 3 20 ga Ethos 20 ga (23) 12ga Beretta A400 (24) 20ga SX3&4 (31) 20ga Beretta A400 Any defective Patternmaster items MUST be returned directly to Patternmaster. Please call the following phone number to arrange an exchange. Patternmaster 608-767-1642