Guiding rails for slide-in filters (Diffusion Screens 5583 respectively 5593 and Polarizers 5594). 2 pairs.

5582: For reflector size 50 x 21 cm (19.7 x 8.3 in.)
(Lighting Units 5556, 5557, 5558, 5588 and 5868)

5592: For reflector size 64 x 21 cm (25.2 x 8.3 in.)
(Lighting Units 5589, 5590, 5591, 5595, 5656)