The Sure Grip Magnetic Powerhead Holder provides a new way of attaching power heads to your aquarium. Using the Sure Grip the Maxi-Jet, Tunze Stream or Seio Super Flow powerheads can be placed anywhere on the wall of a glass or acrylic aquarium. The Sure Grip 100 comes complete with two magnetic housings, eight sticky-backed rubber feet and four different plastic brackets. Time to get rid of those prone-to-fail suction cups.The Algae Free Sure Grip 100 Magnetic Powerhead Holder is compatible with the following pumps and aquarium thicknesses:Seio Super Flow M620, Seio Super Flow M820, Seio Super Flow M1100, Seio Super Flow M1500, acrylic or glass 3/4" or lessTunze Stream All Models, acrylic or glass 3/4" or lessMaxi-Jet 400, Maxi-Jet 600, Maxi-Jet 900, Maxi-Jet 1200, acrylic or glass 5/8" and 3/4"