The Revar Cine Rota-Tray is a geared filter tray designed in the USA from aircraft grade aluminum and poly materials to interface with the latest 4×5.65 and 6.6x6.6 matte boxes on the market today. Commonly referred to as a Rota Pola, this geared tray allows for a use of a common unmounted circular polarizer in a rectangular 4×5.65 or 6.6x6.6 tray. This is the version with no filter. Compatible with all Schneider 138mm filters with the metal mounting ring removed. The tray is not compatible with diopters or any other effects filtes. Maximum 138mm unmounted flat filter thickness is 4mm. The tray is compatible with Arri standard width tray matte boxes from many brands including Arri, Bright Tangerine, Wooden Camera and others.