52mm Adapter Ring + Wide Angle Filter Holder for Cokin P series This product is third party made. Filter holder made of plastic. Adapter ring made of aluminium alloy (chromized). Compatible with Cokin P series. Improved design, avoids black corner in wide angle lenses. Suitable for all color filters for Cokin P series, can be removed easily. Package Included 52mm adapter ring for Cokin P series x 1 Wide angle filter holder for Cokin P series x 1-