Leoben Underwater Flex Arms are made of rugged plastic material for attaching dive lights or strobes.
Using 3/4" dia tube to be connected each other into different lengths . All adapters of ball end ,YS end , T base mount, ,hotshoe mount ,1/4"-20 ball mount are made of aluminum alloy and are locked by screw inside to avoid the light or camera falling off .
all flex arms are firm enough to steady the light . you won't worry about its stability when using it under the water.