4" StiX System Arm without floats. Our unique removable ball end design allows you to add up to 5.8 ounces (160 gm.) of flotation to this arm. Our ball ends are made from a strong, chemical, and UV resistant composites; this material allows a design without "O" rings and a very smooth feel. Our strobe arms made from 40,000 psi tensile aluminum with a black hard anodized finish. Length: 4.25" ACCEPTS 1 FLOAT Weight: 1.4 ounces. THIS ARM WITH 1 SX-90 FLOAT AND 2 SX-C CLAMPS IS NUTRAL!