The Middle Atlantic ERK-4FT-285CFM Integrated Fan Top is designed to optimize cooling for your rack systems. Pre-assembled for convenience, this fan top features three powerful 4-1/2in fans with fan guards to ensure efficient airflow and equipment protection. It is built with durable steel construction and finished in sleek black to match your rack s aesthetics. Compatible with WMRK, ERK (35 space and higher), ERK-KD (all heights), and SCRK racks, the fan top is an ideal solution for enhancing ventilation and extending the life of your equipment. Save time with this pre-assembled fan top, which ships fully assembled and ready for installation.