9" StiX System Arm with 12 ounces of flotation Our StiX 9 inch arm with a full complement of large floats provide 12 ounces (333 grams) of flotation from our nearly indestructible high density black foam. Our ball ends are made from a strong, chemical, and UV resistant composite; this material allows a very smooth feel without "O" rings. Our strobe arms made from 40,000 psi tensile aluminum with a black hard anodized finish. Our unique combination of materials affords unequalled buoyancy to travel weight. Length: 9.2 inches (235 mm.) Travel weight: 4.5 ounces (130 grams).