Designed to aid in the protection of either a baby anemone, mushroom , or leather coral. Will allow a mushroom or leather coral to naturally attach to a plug, disk or rubble. Prevents your mushroom from being pulled away by the currents within your tank and accidentally sucked away by either your overflow or filtration system. Size - Fits up to a 1.25" Inch Frag disk or plug. Includes a free 1.25" frag plug to start you frag off with. (Frag plug type and or quality or material may vary) These shroom baskets are 3D Printed from Reef Safe PETG Plastics. Each shroom Box has a matching locking lid, just align the grooves, and the lid snaps securely into place. Custom made plugs or discs to match are available and sold separately if more are needed. we sell many sizes and styles.