Urinal Blocks are water soluble cleaning and deodorising blocks for use in all types of troughs and urinals. These contract urinal blocks are free from para Dichlorobenzene to help prevent blockages in pipework and reduce the number of flushes per day.3kg tub Water-soluble urinal blocksPleasant lemon fragranceContains advanced surfactant technologyHelps prevent blockages in pipeworkNon-PDCB (paradichlorobenzene)Average 150 blocksKeep out of the reach of children.