Interchangeable fluid shaft suitable for installation in hose reels in dimension 1/2”. They are available in galvanized and stainless steel AISI 304. In combination with the swivel joints of catalogue pages 216 and 218 they enable the use of a painted steel hose reel model also for fluids that require wetted parts in stainless steel (f. ex. water, AdBlue®/ DEF/AUS32), just by changing the components which are in contact with the fluid.