Two (2) Algae Free Sure Grip Magnetic Powerhead Holders. Both are Model 100. These will work on glass/acrylic on 3/4" or less. One was used for three months the other was used for one month, they are complete with boxes. They work great. I do not use them any more, as I went to Ecotech powerheads which are magnetic. They list new at Marine Depot for 34.95 each, will sale for $25 each. You would have to pickup at the IH-10 Callaghan Road area.