Humidity Blocks cabinet incubators

[gardenchix]

Does anyone know where you can purchase the humidity blocks for the cabinet incubators that look like big white sponges ? Or wicking pads
Are they in filters or something so you dont have to pay a fortune for them from brinsea and gqf thanks

 

[BirdsBeesTrees]

I cut mine to size.
https://www.amazon.com/gp/product/B07B9YWNK7/ref=ppx_yo_dt_b_asin_title_o05_s00?ie=UTF8&psc=1

 

[gardenchix]

I cut mine to size.
https://www.amazon.com/gp/product/B07B9YWNK7/ref=ppx_yo_dt_b_asin_title_o05_s00?ie=UTF8&psc=1

Thank you