The Pro Hood Vignette Set from Lee allows 4.5" vignettes to be mounted on Lee Standard Lens Hoods (Lee #LH, #LH2S, #LH-S). It comes with a pair of 2mm thick slots and mounting hardware. This kit includes only the slots that allow vignettes to be mounted on the front of the Lee's Lens Hoods (sold separately).
Optional vignettes can be used to add shadows, masks and effects to your photos and will open a whole new area of photographic possibilities once you have mastered the basic principles that affect their performance.