Standard nozzle - 2 pcs replacement nozzles per pack. Designed only for use with the Oclean oral irrigator W10. Aims at deep cleaning between the teeth and below the gum line. 360° rotating nozzle tips, specially designed to remove discolouration and stains from the teeth, can penetrate deep into areas that manual brushes cannot reach. Easy to replace - press and insert, replacement recommended every six months.