- 23 % Discount-Price: EUR 74,96instead of 98,00 EUR (single purchase) Autoclavable Bags with micro air filter for professional spawn / substrate production. Type 14 # with lower gas exchange - The proven bag for shiitake production! Material: Polypropylene Pores: 0.2 Microns Dimension: Length: 48 cm (19 inch) Width: 20 cm (8 inch) Gussets both sides: 5 cm (2 inch) Bottom to filter: 30 cm (12 inch) Each bag can be filled with approx. 2,5 - 3 kg spawn / susbrate! Unicorn Bags produces a side-gusseted style that gives a sturdy stand-up bag after filling and a strong bottom seal. Manufactured with equipment we designed and with proprietary additives, Unicorn Bags are pliable at any temperature as well as after sterilization. The bag opening is designed for easy sealing and the bag's bottom seal can withstand agitation.