High-quality glass - Fzone lily tubes are made of premium quality borosilicate glass, this non-toxic and high-quality high transparency glass is not only beautiful but also safe. 19mm inflow and outflow lily pipe aquarium suitable for water flits system 19/25mm (3/4 inch ID) tube, aquarium lily glass tube contains 1 x outlet pipe 1 x outlet pipe 8 x solar cups and 1 x pure brush.