The Filmtools 4" Blue Chroma Adhesive Tape made with thin foam backing and an easy to peel backing to stick onto surfaces. Each roll measures at 4" wide by 60' long. Chorma Tape is used for invisible seaming of chroma colored back drops and cloths. Also used to key small objects or areas. It's high adhesion adhesive system sticks to a wide variety of materials. Filmtools carries a selection of different chroma tapes.