The high-end composite quartz granite material has hard, smooth, non-porous surfaces that reduce dirt and where dirt can hide, making kitchens cleaner, does not scratch and effectively protects your hands. The combination of R15 tightly rounded corners and ultra-smooth surfaces makes the sink easier to wipe clean, eliminating accumulated time. 80% of quartz crystals and other modified resins conform to make quartz sink without the risk of radiation contamination, can be in direct contact with food, safe and non-toxic.