Carlsons 09102 Black Cloud Beretta/Benelli Mobil Long & Mid Range Choke Tubes, 12 Gauge The extended tube is constructed of a titanium-coated steel, and Comes in Mid range and long range models The long range choke tube should not be used with any steel shot larger than BB or with any steel shot faster than 1550 The Mid range 09102 can be used with all steel shot sizes, and with ammunition that exceeds 1550 FPS