The Intimidator is a professional grade avian deterrent which uses motion and bright flashing to scare away woodpeckers and other birds from unwanted areas. Woodpeckers can cause serious damage to homes and other buildings. This deterrent is lightweight and needs very little air current to create a dynamic visual effect that frightens birds. Dimensions of the Intimidator flashing pieces are 14"L x 4" Wide. Comes with a 17" mounting arm.