The Spacer Appliance reduces the working range of the Mighty Magnets by approximately 3/8”. For example: if the Mighty Magnets you have are rated for a working range of  ½” to 1” thick tank walls, and you add the Spacer Appliance, the Mighty Magnets will now work on ¼” thickness as well. Spacer Appliance (B) is compatible with Mighty Magnet models F-4, F-5, F-6, FF-3, FF-4, FF-5, FF-6, FISH-3, FISH-4, and FISH-6.

Dimensions: 2-1/2″ x 5-1/4″ x 3/8″ thick. Actual product and color may differ from picture.

Always clean, inspect, and test products in an inconspicuous area of the aquarium.