from aluminum, this extension arm is rusts resistant,ensuring stability and reduced winds resistance during fast speed for adventure enthusiasts, this extension arm caters to skiers, skateboarders, cyclists, motorcyclists, and skydivers to captures their thrillings with precisions for outdoor sports, this extension arm can be used as stabilizers or selfiestick, providing for capturing stunnings footages Enhances your action camera with Aluminum Extension Arm, featuring 1/4" 20 threaded hole for mounting option, for capturings dynamic shotings for Action cameras With innovative hollows and three layer structure, this extension arm ensures secure connection, making it essential accessory for any action camera user to elevates their filming capabilities