The suction force of magnet box is recommended to be 600-800kg for the production of composite slabs on stable platform, and the use spacing of the magnet box is adjusted according to the height of the formwork (generally 1-1.5meters one piece), in the production on vibration platform, 1000 kg magnetic box is more suitable. When producing wall panel,1350 kg magnet box is suggested; When producing prefabricated beams, columns or other special-shaped components, 1800-2100kg magnet boxes with customized adapter is recommended.