These are blocks of used mushroom substrate, previously used for shiitake mushroom cultivation. * Recommended for nutritional supplementation for 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 them into fermentation mats. * It is also possible to make fermentation mats with this product. * Since they are stored in a warehouse, small insects may be mixed in. * The blocks may break during shipping. 【Size】 * Height: Approximately 12cm x Width: Approximately 10cm (average) * There may be slight variations in size. 【Quantity】 * 36 pieces 【Shipping Method】 * As shown in photo 4 (packing example), they will be placed in a cardboard box and protected with newspaper for shipping. Thank you for your understanding.