For 72 mm front filter thread. Contains 2 x 100 x 100 or 100 x 150 filter towers. 360° round seals for light seals. Includes a circular polarising filter. The circular polarising filter rotates independently. Can hold 2 rectangular filters and polarizers. Easy installation. Aluminium alloy construction. This Haida M10 filter holder kit is designed to allow the practical use of three 100mm wide and 2mm thick filters, available separately. It can be placed on a lens with 72mm front filter wires with a circular polarising included The kit includes three main components, an M10 filter holder, an adapter ring for filter holder and a circular insert polarizer. The aluminium alloy filter holder comes pre-installed with two pairs of plastic filter slots, a configuration that supports two rectangular filters. Using the filter holder can be easily achieved by first screwing the filter holder adapter ring included in a lens with a 72mm front filter thread. The adapter rings available separately allow you to use the filter holder with lenses with front filter thread 49mm, 52mm, 55mm, 58mm, 62mm, 67mm, 77mm and 82mm. Once installed in the adapter ring, the push-pull locking lever on the filter holder helps to provide a reliable and adjustable connection allowing the holder to rotate 360°, which also helps to dutize a graded neutral density. and other filters enhanced by varied positioning. To prevent unwanted light from entering between an installed filter and a connected lens, which may have adverse effects on exposure.