Grohflex Shower Set Timeless Dual Function Thm - 2.5 Gpm Rainshower Cosmopolitan 160 shower head - 4 spray, 2.5 gpm (27 135) Rainshower 12 in. shower arm (28 577) GrohFlex THM Timeless dual function (19 849) New Tempesta Cosmopolitan 100 shower set - 4 spray, 2.5 gpm (27 577 001/EN1) Relexa wall union (28 672 000 / 28 672 EN0) Rainshower Cosmopolitan 16 shower head - 4 spray, 2.5 gpm (27 135), Rainshower 12 shower arm (28 577), GrohFlex THM Timeless dual function (19 849), New Tempesta Cosmopolitan 1 shower set - 4 spray, 2.5 gpm (27 577 1/EN1), Relexa wall union (28 Requires GrohFlex Universal Rough-In Box (35 26)