Bird-Collision Prevention Window Tape
TREAT GLASS - SAVE BIRDS!
Removable and covers only 6-8% of the glass and will not damage glass surfaces or exterior glass coatings such as Solar Reflective, Low-E, or other glass treatments. 
DIY - Black or White - Includes three 100 ft. rolls of square ¼” markers pre-spaced at 2” apart. Each 100 ft. roll is enough material to treat 16 sq ft. of glass, or equivalent to a 4’ x 4’ window.