Peel and stick the Optical Gel Zip to the bottom of each original Optical Gel disk, and zip tie to any tubular building feature. This allows placement on round pipes, tree limbs, mesh grating, indoor water sprinkler systems, railings and more. One zip tie is included with each base. The product is available in packs of 100 Zip-Tie Stick-On Bases and 100 Zip-Ties. The Optical Gel is not included.