New floating, closed cells material. Dos not mark boat hull. Resistant to UV rays, oil, fuel and chemical products. Ideal for fishing nets, pools, safewaters delimitations... It is different for the high quality recognized by all the fishermen in the world.Leng. mm. 135, Ø Ext. mm. 90, Hole Ø mm. 18, Colour: white, Buoyancy gr. 650.