P- recessed Z - Wall Characteristics of the SAND series: Square sinks have a decent rounding of the corners and a very slender front edge The toilet bowl is equipped with a SAVE WATER system that allows only 4.5 liters of water to be flushed, the seat with the SOFT CLOSE system and the QUICK RELEASE (removable seat) WC bowl in the variant with Swirlflush® flushing system The whole series is equipped with the EXTRAGLAZE glaze The extraglaze® ceramic glaze is applied to the products during the production cycle prior to firing, thus ensuring its lasting effect. Extraglaze® supplies the ceramics with a perfectly smooth surface, high gloss and protection against lime deposits. The ceramics are so bright and easy to clean.