The servo arms fit shafts of 3mm, 4mm, and 5mm diameters, ideal for steering output shafts or electric motors, offering versatile functionality Crafted from premium aluminum alloy, these servo arms deliver strong construction and extended usability, even in demanding mechanical conditions The package contains three servo arms (3.1mm, 4.1mm, and 5.1mm), providing complete specifications for easy and adaptable integration into different mechanical setups Each arm features side mounting holes for secure screw attachment, ensuring stability and flexibility when used as crank linkages or drive components This set includes three red servo arms (3.1mm, 4.1mm, and 5.1mm) made from sturdy aluminum alloy, designed for accurate and consistent action in various applications, Manufacturer: Kfwfuaee