This float (dimensions 150x55x25mm) offers 160g of buoyancy. 4 holes for 5mm screw, spaced by 14mm allow easy mounting options. Mounting kits are sold separately for the various types of underwater arms. Floats can be coated with epoxy for more protection or with acrylic paint (please bear in mind while ordering this option that the processing - actually the epoxy drying time - of your order will be extended by 10 days).