Ribbed on both sides, the Ribbed Monolith is a great contemporary style recommended for the outdoors. With the water rippling down the sides, you won't be able to take your eyes off it. Although not shown, you can add an 18 sphere on top to add more height. Call for more info.Ready to install and made of a Polymer and Cast Stone mixture so is made of a lighter than most cast stone products. This fountain is engineered for proper water flow with an indoor/outdoor UL-listed pump GPH 500 that uses normal household current. This fountain will take its place as a magnificent garden focal centerpiece in your garden and will be enjoyed for years to come. Made in the USA.