The all new frag rack is perfect for holding your coral frags. This listing is for size medium which allows space for 13 frag plugs! 
The magnet strength allows for aquariums up to 21mm in glass thickness! These are the perfect touch for stability, opposed to the suction cup counterparts that are known to fail. 
Size Small dimensions: 
Length (Front/Back)- 63mm 
Width (Side/Side) - 140mm
Depth (Top/Bottom) - 32mm
These racks are supplied are n52 magnets with a special coating to prevent leaching, however as extra precautions we also siliconed the magnets inside the print!