These are diameter 30mm sponge head tubes.
We could do Diameter 19mm, 30mm, and Diameter 35mm sponge tubes.
Sponge tube generally is not for skincare packaging, they are for Make up products.
You could make different colors like the pictures if you have a series make up colors.
There is a hole in the sponge that is where the product comes out.
You could try it if you are interested in.
Any samples are IN FREE.