Extra-thick autoclavable mushroom grow bags. They measure 4" x 14", designed to hold 1lb-3lb of substrate for sterilization in a pressure cooker. They include a 0.5 micron breathing filter.
Extra-thick autoclavable mushroom grow bags. They measure 4" x 14", designed to hold 1lb-3lb of substrate for sterilization in a pressure cooker. They include a 0.5 micron breathing filter.