Elegant-looking magnetic frag rack with a clever membrane that securely grips the frag plugs to keep them in position even if they have different sized stems. Available in 3 sizes. Each hole has a clever membrane that securely grips the frag plugs to keep them in position even if they have different sized stems. The rack's modular design allows the user to move the rack for easy maintenance or acclimation of small corals. Available in 3 models. Features - Slim Profile - Special membrane to lock frag plugs in place - Strong magnet mount holds up to 1/2" Available Sizes - Small - holds up to 8 frags, 5" x 3" x 1.8" - Medium - holds up to 23 frags, 9.5" x 4.1" x 1.8" - Large - holds up to 32 frags, 9.5" x 4.8" x 1.8"