Hearth (BF Grey 302) raising queen ants this Mini Hearth comes as

this Mini Hearth  comes as shown in the photo on this page

Medium/Large tunnels and chambers -  Recommended for Camponotus spp

Are they expandable

Vermiculite is a natural rock

You can connect this Mini Hearth using a tubing port on the short-side opposite the water tower (3/8" hole)

Hearth (BF Grey 302) raising queen ants this Mini Hearth comes as***This is a Black Friday Cyber Monday formicarium*** ***This product is available for immediate shipping and is shown in the accompanying product photos.*** ***Rock Celling Interior***(+10) Click on this link to see more about this product. Features: Nest is 2. 5" x 8" (75mm x 200mm) Stalactite Decor On Ceiling Decor (Per Photo) Color (Per Photo) 2 XL water towers Type III material Museum Glass Optional