2 x G 1/4" (Male - Male) adapter in a nice finish from EKWB.
This adapter has 1/4" BSPP thread on both ends, so it can be used between the pump and reservoir, or wherever you need to put the two things together, either where there is not much space, or when things should be able to rotate independently of each other
Threading: 2 x G 1/4" (Male - Male)
Thread length: 4mm
Thread length: 12mm