Swimming pool PVC/PP overflow gratings THE INTERVAL IS UNIFORM AND NOT EASY TO CLOG After high temperature die-casting, the grinding tool is formed once with uniform interval, which is not easy to clog, and has good wear resistance and anti-skid effect. MESH NON-SLIP PROTRUSION Grille surface grid protruding particles, significantly increased friction, in the slippery pool is not afraid of skidding.