Atlantic Water Gardens CS12 Spillway, 12", Copper Finish 304 stainless Steel spillways provide an enticing and durable focal Point for freshwater applications in the landscape Atlantic spillways replace 4 inch wall blocks for easy and convenient installation in garden wall Block construction Enhances any vertical wall installation Heavy gauge construction from 304 stainless Steel provides ageless durability Load bearing body design for trouble free installation Non-clogging weir for open water basin installations and decreased maintenance Do not use in chlorinated water