I designed this to do provide several new options not seen before in a part cooling structure. First I wanted to have as much access to the hotend assembly as possible. This is achieved because the cooling fan and duct can be moved out of the way without disassembly. Second New thing is that i wanted to try using a 5015 blower fan to cool the print head, as i had never before seen that being done. Third is i wanted to use as few attachment hardware as possible. This is accomplished with a single 3" nut and bolt to hold all 3 fans onto the carriage. This is designed to fit a standard creality style hotend carriage, and standard hotend or micro swiss hotend only. it specifically fits my ender 5+ with micro swiss and bl touch.