# List of Stag Beetle and Beetle Products on Mercari ← Click here! Thank you for viewing my products from among many others. We have been manufacturing high-quality beetle and stag beetle supplies for over 30 years. We are very grateful to our many repeat customers. Thank you also for the many reports of positive results. Limited sale!! 100% Kunugi (Japanese oak) raw material! This is a listing for used mushroom substrate blocks. Please take a look at the 10 photos above. We will ship the number of blocks you desire. We will combine shipping for any number of blocks. These nutritious mushroom substrate blocks are made from 100% raw Kunugi, which beetles and stag beetles love the most. As you can see in the image, the mycelium is well-developed inside. Excellent for nutritional enhancement of beetle larvae! When raising beetle larvae, simply bury the blocks in the fermented mat, and the larvae will burrow into the blocks and eat heartily. You will definitely see a size increase compared to raising them with just the mat. You can also break them up and use them as a raw material for creating your own original fermented mat. Some people use them as a substitute for egg-laying logs for stag beetles. *The images are of one of the items in stock. Please understand that there may be some that are slightly broken or have different shapes, and only purchase if you are okay with this. We also provide product and breeding support after purchase. We also sell unfermented mycelium mats for stag beetles, calorie mats specifically for giant stag beetles, coniferous tree mats that are ideal for adult beetle management, and perches, high-grade pro-jellies, and nutritional supplements that can be used for adult beetle breeding and display, so please take a look at my other listings as well.