Elinchrom Stackable External Diffuser For Rotalux Rectabox 90x110cm. Diffuses light evenly and cleanly when mounted to the front of the Rotalux Rectabox 90x110 cm. Suitable for use in conjunction with Rotagrids, stacked for multiple levels of diffusion, or as a replacement for a worn Rotalux External Diffusor. Elinchrom are a Swiss studio lighting manufacture famed for their consistent innovation and being at the forefront of both portable and studio photographic lighting equipment. Since the