The Necron Monolith is a single super-heavy floating fortress. Its four corner ball-turrets swap between gauss flux arcs and death rays, while the particle whip on top is a fixed weapon. Below are the recommended magnets and kits for this model, plus links to other Necron magnetization guides.
Monolith Magnetization Kit
The Monolith has four corner weapon mounts that can be built as gauss flux arcs or as death rays. Magnetizing the corner turrets lets you swap between the two profiles for any list. The Monolith No-Drill Custom Magnetization Kit ships with replacement parts pre-cut for magnets, so there is no drilling the GW corner pieces by hand.
[Buy Product=monolith-magnetizing-kit,Variant=All]
Flight Stand
The Monolith sits on the newer extra-short flight stand. Use the Large Flat Extra Short option from the GW flight stand kit.
[Buy Product=gw-flight-stand-magnetizing-kit,Variant=All]
Base to Case
To magnetize the base to a transport case, use 6mm x 2mm disc magnets. One magnet is enough if you remove the model from the base for transport, or three to four if you carry it on the base.
[Buy Product=50pcs-6mm-x-2mm-disc-magnets-n52,Variant=All]
For a drop-in replacement base with magnet holes already cut, use the 160mm round base with magnets.
[Buy Product=bases-premagnetized-warhammer,variant=30427499757652]
For flat-bottomed third-party bases, use the peel-and-stick inner base magnet.
[Buy Product=flexible-self-adhesive-magnets,variant=51483453948194]