This filter pack contains an array of filters each 305 x 305cm in size plus an internal folder the 15 differing coloured filters have been selected to adjust and balance the colour of various light sources including cbts to boost the temperature of warm lights ctos to boost daylight balanced sources and a range of plus and minus green filters to modify the light from other artificial lighting the full filter list comprises of full blue 12 blue 13 blue 14 blue 18 blue roscosu