There are only fixing screws and an iron plate in the sucker of the chandelier.

The chandelier sucker is heavy, not because of what is in it, but because the chandelier sucker itself is very heavy.

The chandelier sucker needs to fix the lamp and lampshade, so the quality of the chandelier sucker should be particularly good, so that there will be no safety hazards. Not all chandelier suction cups are heavy, but some are light.