One quart bag of injectable mushroom substrate. Sterilized Brown Rice Flour, Coconut Coir, Gypsum. Inject with 1 cc or less of any viable mushroom culture and watch it grow! Fruit your mushrooms inside the grow bag, or cut it open for better ventilation. Basic mushroom cultivation knowledge is required to use this product. Squeeze and loosen the substrate before injecting. Wipe the blue silicone port with isopropyl alcohol. Flame sterilize your culture's needle tip. Push needle tip through the blue silicone port and inject. Set in a warm area to colonize. During colonization, you may squeeze and shake the substrate to spread mycelial growth faster. When fully colonized, stand the bag up and pull the edges apart to make room for mushrooms to fruit inside the bag. Made in New Hampshire at Fungus Farm LLC. Returns/refunds available within 30 days of receipt. Mushroom culture NOT included.