Magnetic planter. The moss ledge is held in place with small but strong magnets no suction cups to mess with. This small simple planter can be used to isolate particular plants especially those that are more invasive. It can also be used to elevate smaller species up for better viewing or to keep an eye on a particular plant. Just add a small amount of substrate and the plant easily place anywhere along the glass. - Magnets are epoxy coated for better corrosion resistance.