* This makes them perfect for specialist anglers constructing presentations like Paternoster Rigs or Helicopter Rigs using Flexi Ring swivels on the Slim version of the Rigid Rig Tubing.* Just like the tubing, the Lock Beads are available in 2 size: * Slim - 1.5mm I/D fits securely on ‘Slim Rigid Rig Tube’ * Standard - 2.5mm I/D fits securely on ‘Rigid Rig Tube’ * Each pack 12 x 6mm flexible beads per packet. * Lock beads are available in C-Thru Green, Brown, Silt and Mixed colour packs. * HINT: Moisten the end of the tube to slide on the lock bead.