ITEM NAME:11inch Ball Full Aluminum Arm For Connecting Strobe Light To Underwater Description: Durable and lightweight, It allows to expand your underwater photo video gear to your demands. Ball arm is used as a bridge to connect underwater tray/handle to underwater strobe/video light Construction: Corrosion-resistant aluminum alloy (hard anodized body) Length: 27.5CM/10.8inch Color: Black Package Includes: 1 Piece Ball Arm Adapter Note: Please allow slightly difference due to manual measurement. Color may be slightly different since different monitor. Thanks!.Ball arm is used as a bridge to connect underwater tray/handle to underwater strobe/video light. Durable and lightweight, It allows to expand your underwater photo video gear to your demands. 1 Piece Ball Arm Adapter.