Unicorn 4T Autoclavable Mushroom Grow Bags (0.2 Micron Filter) The Preferred Bag for 1–3 lb Grain Spawn The Unicorn 4T is the industry-standard grow bag for grain spawn in the 1–3 lb range. Its compact footprint, durable construction, and 0.2 micron filter make it ideal for clean spawn production and smaller substrate runs. Why Choose the 4T Unicorn Bag? Perfect for 1–3 lb Grain Bags – Ideal for spawn production and testing runs Side-Gusseted Design – Expands into a sturdy, stand-up bag when filled Strong Bottom Seal – Built to withstand shaking and agitation Autoclavable Polypropylene – Durable through sterilization cycles Pliable at All Temperatures – Maintains flexibility before and after sterilization Easy-Seal Opening – Designed for clean impulse sealing Product Specifications Type: Side-Gusseted Material: 3.0 Mil Polypropylene Bag Dimensions: 4" x 3" x 18" Filter Type: T Filter Size: 1.5" x 1.5" Filter Pore Size: 0.2 Micron Filter Hole Style: L Built for Clean Spawn Production With its 0.2 micron filter, the 4T bag provides tight filtration during sterilization and colonization, making it a trusted choice for grain spawn preparation. The strong gusseted base allows the bag to stand upright after filling, improving workflow and storage efficiency. Bulk pricing available — select higher quantities to reduce cost per bag. For laboratory and research applications. Bag performance depends on sterilization technique and handling procedures.
