Fancy making your own grain bags? These mushroom spawn bags are top quality, pre-seable and filtered. You can fit 1kg of grain inside and seal them before sterilising. With the perfect size filter to allow fast colonisation and strong, heatproof polypropylene you will not be disappointed. Use our premium Gypsum to PH balance your grains and add vital minerals. SHIP (Self-healing injection port bags).
Size:（NOTICE: Width is the measured value of the pocket unfolding）
width x length