3D printed rainbow spiral ejection decompression ball

This is an interesting 3D printing product, It has a spiral structure and a great visual effect
They can be infinitely linked and lengthened.

It contains 7 products (7 colors of rainbow: red, orange, yellow, green, cyan, blue, purple)

It can be linked arbitrarily

Each size: length 62mm/diameter 35mm

Includes 2 spiral balls/2 springs/2 cover plates