Mushroom grain spawn bag and super substrate kit.5LB grain 10LB substrate. | eBay
1kg 1.5kg Sterilised Grain Spawn Bags WITH Injection Port - Etsy
Premium Grain Bag For Mushroom Spawn (Spawn Bomb) – Curative Mushrooms Shop
Amazon.com : Gymgit 15-Pack Mushroom Grow Bags, Heavy Duty 6 Mil Polypropylene Mushroom Substrate Bags, Large Size 8" X 5" X 20" for Mushroom Cultivation, Spawn Bags, and Sawdust Fruiting Blocks :
Mushroom Grow and Spawn Bag w/ injection site – 2lb Sterilized Rye – Everything Mushrooms