Filter Holder for 100mm (4") Lee, Hitech, Cokin Z, Singh-ray Square Filters Two slots for two 100mm or 4" filters (fits Lee, Hitech, Cokin Z and others) Back side to be mounted onto common Cokin P (or Hitech 85) lens adaptor rings Extremely cheap and simple but holds the filters just as well as standard metalic holders for fraction of cost No vignetting on up to 18mm FullFrame lens Weights only 22 grams. Free shipping worldwide.