Square Accessory Kit for Cokin P Series. Includes: Metal Adapter Ring Set (49mm, 52mm, 55mm, 58mm, 62mm, 67mm, 72mm, 77mm) + Square Filter Holder + JB Digital Microfiber Lens Cleaning Cloth Includes: 1 x Square Filter Holder / Adapter Rings Set (49mm, 52mm, 55mm, 58mm, 62mm, 67mm, 72mm, 77mm) for Cokin P Series. Screw the ring adapter onto your lens. Slide the colour filter holder on the ring adapter until it snap in place. The Ring Material is aluminum. Included: JB Digital Microfiber cleaning cloth.