Universal Mounting Specification (UMS) heatsinks, available for purchase individually.
4U 300mm (One side)
One "4U" 165 x 300mm x 40mm wave pattern finned heatsink (enough for one side of a chassis)
Purchase two sides if you would like enough to complete a whole chassis
5U 400mm (One side)Two individual "5U" 210 x 200mm x 40mm wave pattern finned heatsinks. These must be joined together with chassis rails (sold separately) to create one "side". When joined these two heatsinks form a 400mm deep heatsink (enough for one side of a chassis).Purchas..