Flipper Magnetic Frag Station - Frag Rack with Removeable Shelf - Holds 14 FragsFlipper Magnetic Frag Station Frag Rack is designed to securely hold up to 14 frags for easy observation, acclimation, and display. Perfect for glass or acrylic aquarium walls up to 3 8 thick. Designed to fit most standard frag plugs and discs (20 30mm, 38mm round plus 20mm square discs can be accommodated). Unique external fragging utility shelf with simple slide on off attachment works as a great workspace to help with various aquarium projects.