Normal lumbar assembly

This natural lumbar spine shows the normal lumbar spine, disc and nerve roots. It has a base. There are three models
Two-section spine, packing: 32 pieces/box, 62x29x29cm, 15kgs
Three-section spine, packing: 20 pieces/box, 50x35x42cm, 10kgs
Four-section spine, packing: 20 pieces/box, 50x35x42cm, 11kgs