Honl Photo's superior quality filters attach quickly to the Speed Strap (sold separately), and can be used in tandem with Honl's Speed Grids, Speed Snoots, Speed Gobos, and Soft Boxes 8 and 16. Custom cut from the same durable and dependable filter material used by major Hollywood studios. Usable filter area is 2.5″ x 4″ and can be trimmed with scissors to fit your individual strobes. The Environment Green Filter Kit includes 2 of each filter: Lime Green Jade Fern Green Aurora Borealis Velvet Green