Cooler Master HAF Stacker 935 Two-Piece Mod-Tower Computer Case with Top Compartment for Extra Storage Space, Water Cooling Support, or Mini-ITX System World's first "mod tower" with stacking functionality for limitless utility Stack extra HAF Stacker 915F or 915R for dual/triple system or additional water cooling and storage Dust filtered intakes and sliding filter frames Intuitive design for flexible and easy installations Greater storage expandability with transferrable drive cages between chassis Tinted window side panel to showcase internals Modular I/O functionality for future-proof connectivity Multiple removable dust filters (top, front, bottom, side panels) for improved system maintenance