These are blocks of used mushroom substrate, previously used for shiitake cultivation. * Recommended for providing nutrition to rhinoceros beetle larvae. * Can be used for both domestic and foreign rhinoceros beetles. * Can be used as a substitute for egg-laying logs for stag beetles. * Can be used in various ways, such as burying or mixing into the substrate. * It is also possible to make fermentation substrate with this product. * Small insects may be mixed in. 【Size】 * Height: Approximately 20cm x Width: Approximately 12cm (average) * Some errors may occur. 【Quantity】 * 8 pieces 【Shipping Method】 * Will be shipped in a cardboard box, protected with newspaper. * Blocks may break during shipping. Thank you for your understanding.