Carlson's Choke Tubes American Arms 20ga Black Sporting Clay Skeet Black. This Skeet Choke by Carlson's Choke Tubes has a skeet-point parallel section that produces a finer pattern than a musket choke tube. The Carlson's American Arms Skeet Choke Tube is made with a 17-4 stainless steel material that is guaranteed to be long lasting and efficient. This Carlson's Choke Tubes Wrench- Included Choke Tube has a skeet point that is great for clay targets. The Carlson's American Arms Skeet Choke Tube is a one piece that fits into the North American Arms Carbine Choke Manufactured Choke System. All Carlson's Choke Tubes are made with a strong hammer spring that enhances the life of your choke tube. The Carlson's American Arms Skeet Choke Tube is backed by Carlson's Lifetime Warranty. Specifications for Carlson's Choke Tubes American Arms 20ga Black Sporting Clay Skeet: Manufacturer: Carlson's Choke Tubes Color: Black Fabric/Material: 17-4 Heat Treated Stainless Steel Gauge: 20 Choke Tube System: American Arms Choke Choke Type: Skeet Diameter: 0.628 in Gun Make: North American Arms Quantity: 1 Additional Features: Non-Ported Country of Origin: USA Features of Carlson's Choke Tubes American Arms 20ga Black Sporting Clay Skeet: American Arms 20ga Black Sporting Clay Skeet Package Contents: Carlson's Choke Tubes American Arms 20ga Black Sporting Clay Skeet wrench Carlson's Choke Tubes 27071: American Arms 20ga Black Sporting Clay Skeet Black