The DIY rack solution. The Adam Hall 87410V 19" 4U Rackmount Housing with Vent Slots offers a secure reliable rackmount option to house your favourite rack units. The sturdy design gives the housing a high-quality feel while ventilation slots in the top panel help stop the risk of your internal units overheating. This comes as a flat-packed package complete with screws and construction is remarkably easy and straightforward. Give your rack units the support they need with this stylish housing.