4T-Injection Port - 4″ x 3″ x 18" - 3.0 Mil - 1.5” x 1.5” 0.2 micron T Filter W/INJECTION PORT- Typical Block Size: 3-4 lbs
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This bag includes an injection port. It is identical to bag Type 4-B and bag Type 4-A except that it has a Type T filter. It is often used in the production of grain spawn and holds about a kilogram of spawn.