Is this cage safe?

[Blueberry]

Hi
I found a great house for hammy. I just want to be sure, if is safe, I heard that some woods are not good for dwarfs. Please let me know what do you think.
Thank you!

Songmics XXL Wooden Hamster Cage
Hamster cage / Pet Hutch,
Product Description:
1. Fir material, untreated solid wood, no processing, no painting. Durable, beautiful and comfortable.
2. Three transparent PMMA window, operable roof
3. 3 layers luxurious space, a small bedroom separately on the upper and the middle
4. Move freely up and down with the ladders, 2 seesaws to play A plastic bowl for food, dismountable plank for cleaning
3 floors, including accessories set,


Ps. I am new in the forum and don't know yet how to make a new post..?