Comprising the range of 21 different filters designed specifically for LED lights, this 3 x 5" OPTI-FLECS Swatch Book from Rosco includes small samples of their complete line of OPTI-FLECS filters. Including color correction, diffusion, tint, and neutral density filters, this sampling helps to determine which full-size filters to order. The book is post bound in one corner and technical data, such as transmittance and wavelength charts, is printed on the backing sheet of each sample.