This set includes one Diopter Stage, one Diopter Adapter and three Diopter Frames including all pouches. With this set rentals could offer their diopter set (+0.5, +1, +2 each in a Diopter Frame and +3 in a Diopter Stage) for best storage to avoid any damages on the glass. K2.0013740 3x Diopter Frame 138mm K2.0014745 1x Diopter Stage 138mm K2.0014357 1x Diopter Adapter 138mm to 4.5in K2.0020158 3x Pouch Rota Pola 4x5/Diopter Frame 138 K2.0020157 1x Pouch Diopter Stage 138