Kood P Double exposure Effect Filter for multiple exposure COKIN P system | eBay
Amazon.com : Cokin H250 P-Series Gradual ND Kit Size M : Camera Lens Neutral Density Filters : Electronics
Filters
Amazon.com : Cokin Square Filter Full ND Creative Kit - Includes ND2 (1-Stop), ND4 (2-Stop), ND8 (3-Stop) for M (P) Series Holder - 84mm X 84mm : Electronics
Cokin P Series Filter Holder BP400A B&H Photo Video