100 feet of Bird-X Irri-Tape Bird Repelling Ribbon holographic foil ribbon uses three methods to scare unwanted birds away. Visual scare the constantly shifting and changing light caused by the foil's metallic sheen. Aural scare the rattling metallic sounds made by the foil getting blown around in the breeze. Physical deterrent the tape and its brackets block birds on any surface. Includes 8 Mounting brackets for railings and edges, Assembly Required No, Mounting Type Bracket, Diameter in. 4, Material Type Holographically embossed polyester ribbon, Color Holographic, Dimensions L x W x H in. 96 x 4 x 2, Common Usage Bird repellent.