The HydraMat magnet kits are designed as a cost effective solution for mounting the Holley HydraMat in the fuel tank or cell. Ideal for use in fuel tanks with a small sender opening. Once installed, the magnets can be positioned so the HydraMat lays flat in the bottom of the fuel tank.Magnet with integrated mounting stud Easy installation Kit includes 4 magnets, nuts and washersAvailable in 4-40 and 6-32 UNC stud/thread configurations, with an optional disc magnet kit for non ferrous tanks such as plastic or aluminium. (16-203) - 4-40 UNC thread magnet kit, provides 15 lbs. of mounting strength per magnet(16-204) - 6-32 UNC thread magnet kit, provides 22 lbs. of mounting strength per magnet(16-205) - Disc magnet kit. The discs are placed on the outside of the tank to provide a magnetic mounting point for the mounts placed inside the tank. The disc kit also requires either a (16-203) 4-40 or (16-204) 6-32 magnet kit to make up a full mounting solution.