This Bundle includes THREE items: the Algae Free Tiger Shark Float PLUS Algae Cleaning Magnet, the Algae Free Large Acrylic Replacement Kit for Tiger Shark, and a MarineAndReef Aquarium Cleaning Towel. The Algae Free Tiger Shark Float PLUS Algae Cleaning Magnet includes a detachable and replaceable scraper blade for glass (stainless steel) or acrylic (plastic) aquariums and will make cleaning quick and easy. The Tiger Shark Float is the largest floating magnet available. It has a floating inner assembly and a large 4" x 2" cleaning area for the big job of larger tanks. Its floating inner assembly will float to the surface if disengaged for easy retrieval. This cleaning magnet is for use on glass and acrylic aquariums 5/8" and 3/4" thick. This Algae Free Large Acrylic Kit is for Tiger Shark & Great White Algae Cleaning Magnets. It includes: (1) Adhesive-backed natural felt pad for protection on outer surfaces of acrylic tanks, (3) 9” x 5” acrylic-safe inner scrubbing pads (makes 12 Great White or 12 Tiger Shark pads), and (1) Self-adhesive, non-toxic medical grade velcro pad for holding acrylic safe scrubbing pads on inner assembly. A set of pads comes with the Tiger Shark. These are replacement pads. The MarineAndReef Aquarium Cleaning Towel is a durable, lint-free microfiber towel. 19" X 15".