Loading... Please wait...American Star A-Arms are manufactured out of Precision Formed, Seamless Aircraft Grade 4130 Chromoly One Inch Tubing. All of our products are Precision CNC Bent and then Precision TIG Welded by our In-House Certified Welder. The Bottom A-Arms are Bullet-Proof .120 Wall One Inch Tube with 4130 Chromoly shock tabs and the Tops are .083 Wall One Inch Tube. This provides Maximum Strength and helps keep overall weight of the ATV down. If you bend it or break the arm itself for ANY reason it will be replaced free of charge under American Star's Lifetime Structural Warranty! Our A-Arms are built on an as-ordered basis, so please allow up to 2 weeks for delivery.