This plastic container will hold up to 10 Cokin "P" series filters.  Graduated filters for the Cokin P system are longer (taller) than the standard, ungraduated filters; this box will accept the graduated filters from Cokin and Tiffen, but will not accommodate any graduated filters from Hitech (~109mm tall), Singh-Ray (~120mm tall), nor the "extra long" version Tiffen graduated filters (143mm).