These are made from 100% aquarium and shrimp safe PLA plastic.
 
Nice for shrimp to feel safe in an enclosed area after molting. Can also attach plants or be used for aesthetics.
 
This pad has a removable mesh top to make attaching moss or other plants quickly and easily.
 
Price is per 1 pad
Measurements: 1.25" at widest point and .25" high