* Super-dense Tungsten compound is much heavier than standard sinking rig tubes ensuring it sinks quickly without the need for adding Critical Mass tungsten putty to pin it down. * Ultra soft and supple “bottom-hugging” formula genuinely follows the contours of the lake or river bed to aid better presentation. * Uniform diameter bore makes it easier to thread the mainline. *When you are threading the line, it is easier if the tube and line are dry. * Specifications: 2mm outside diameter / 0.8mm internal diameter * 2 metres per packet. * Low-viz camo colours available in Green, Brown & Grey to match the rest of the Covert range, suiting many different lake or river beds.