member 3 forms an angle equal to half of the inclination angle required for connecting member 3 in the case of a curved shell such as shown in fig2 connecting member 3 can be linked to lower support member 5 in two positions rotated by 180 u00b0 in one of these positions fig1 connecting member 3 is coaxial with straight shell 2 and with attachment 1 while in the other position fig2 connecting member 3 has been shifted with respect to the previously considered position by an angle that is double the angle of inclination of flange 4 in other words by the angle encountered in the case of curved shell 2 of fig2 in this way one can achieve an advantageous design merger between shower heads that have a widely different external configuration the variant of the embodiment shown in fig1 illustrated in fig3 differs other than by the design details only by the manner in which flange 4 of connecting member 3 is linked to lower support member 5 it is understood that this connection can be accomplished in any fashion either by means of elastic undercut snap or for example by means of screws or by gluing or welding with reference to the following figures it will now be explained how the entire device can be easily broken down into its component parts and how it can easily be assembled in the production phase as shown in fig4 flexible cover 16 can be removed from the corresponding window of shell 2 and by unscrewing screw 17 the first delivery member 18 can be detached from lower support member 5 to the latter there is also linked upper support member.