P-Wave Mango Trough Screens are the best answer to controlling malodours in washrooms featuring trough urinals. Each screen has long protrusions on each side which helps direct liquid downward to the base of the trough effectively preventing splashback and improving washroom hygiene. The screen is impregnated with a strong mango frangrace that permeates throughout the washroom and gradually releases over the 30 days. Designed to link together for the length of the trough and prevents requirement for urinal blocks that in some instances can cause inhibit the flow of water as they move toward the drain. Every screen features a 'clock system' that allows you to keep track of how long is left before a replacement is required so washrooms are always monitored and kept smelling fresh. Patented design and an obvious favourite that may not be the cheapest option for urinal and washroom deodourising, but will save you money and time in the long run. An ideal choice for pubs, clubs and schools.