4 parts two for holding the empty grease tube and 2 to hold the hose. This makes it easier to pump fill the tube without having to hold the tube, hose and pump at the same time.
The empty grease tube just slots in and is held firmly by the base holder (at bottom) and upper holder.
The hose is held mainly by the hose clip (tightly) and the upper hose holder is there to take the weight of the hose.
Made with quick settings, my 3d printer a Chinese clone