Increase the surface area of the adhesive when mounting your cooling fan! Made from aluminum which will help absorb some of the heat from your fan as well. Included are two mounts for you to either mount 30 or 40mm fans (not included). Feature: For: 30mm and 40mm Fan Material: Aluminum Color: Black Include: Fan Mount (1) 40mm Mounting Plate (1) 30mm Mounting Plate (1)