Item Name: 25mm Alloy Aluminum Lateral Folding Arm Tube Joint For Plant Protection Drone Product Description: Folding Arm Tube Joint for Quadcopter is the new product designed for large multi-copter. The assembly is without complicated modification. Just cut the boom of fuselage and assemble the hinge, your multi-copter will be modified to a foldable one! Applicable to multi-copter with 25mm diameter booms. Designed by the newest concept, the product is with light weight and high strength. You don’t need any tool to fold or unfold the multi-copter. Easy and convenient to use! Product Feature: 1 Round screw locking structure, very convenient, very tight locking. 2 Arm can be folded back to the horizontal shape, save space. 3 Applicable to the inner diameter is 20mm carbon tube. Product Specification: Material: 6061 Aluminum Alloy Length: 99mm Weight: 60g (with screws) Note: Applicable to the inner diameter is 23mm