Genuine Evolution Aqua replacement ballast box for the Evolution Aqua EvoUV 110w Ultra Violet Clarifier. The process of making the replacement of the unit is quick, simple and easy to understand with the included set of instructions that walk you through the process step by step. The box includes the replacement ballast box, bulb fittings and full instructions. Specifications Product: Replacement Ballast Set For: Evolution Aqua 110w evoUV - UV21110CE