The Vastocean Magnetic veggie clip is perfect for your herbivores! Easily feed nori and other algae sheets to your tangs, just clip it in, slide the magnet in place, and you're all set! The included magnet works with glass or acrylic up to 5/8". Each magnet measures 1.5" in diameter by 1/2" thick. The Clip is 2 5/8" long and opens a max of 1/4". The clip can be removed from the magnet for easy cleaning.