Sterile 1/2 Pint PF Style Jars (12)

Our 1/2 pint jars are made from organic brown rice flour, vermiculite, and reverse osmosis water, which are then sterilized for 60 minutes at 15psi just as the PF Tek instructs. All jars come professionally punched with holes for inoculation via hypodermic needle and syringe. Each jar contains approx 100 grams of brown rice flour/vermiculite/water substrate mix with a dry layer of vermiculite on top of that to help reduce the risk of contamination after inoculation. Guaranteed to be sterile and contaminate free.