What better way to counter balance a pop-up boilies than with Tungsten putty. Still too light? Just add a little bit. Still too heavy? Just take a little bit off. When a carp inspects a perfectly counter balanced pop-up boilie it will appear to be a safe freebee. Tungsten putty allows the carp angler to outsmart them all! Will hold on to your rig firmly, even during the powerfull cast. A piece of 20gr in handy small box. Available in black colour.