The Redrock microMatteBox Filter Stage allows you to have an additional filter stage to your matte box.This microMatteBox Filter Stage with Filter Tray, which is used for dual purpose, can support both 4x4 and 4x5.65" filter sizesThe Redrock microMatteBox filter stage also includes 1 universal 360 degree rotating filter stageYou can install this video camera accessory with ease in minutes