FOTGA DP3000 M2 15mm Rod Rig Matte Box with Donuts Filter Holders for Video Camcorder Camera DV DSLR Cameras 2 dual-purpose filter trays,supportinh 4"x4" filter.One of the 2 filter trays is rotatable,which will be helpful when you use gradual ND filter Compatible with 15mm rod ,center-to-center rails distance 60mm. Height can be adjusted by 4cm Material:Made of metal and plastic Suitable for: wide angle lenses on DV / HDV /Broadcast /16mm/35mm cameras 4pcs different size donuts included.(103mm,76mm,64mm,51mm)