2 Male NPS threaded Dual Action Vent with 2psi spring for use in 6 fill port caps with 2 female pipe thread. Manufactured from FDA food grade materials in a strong glass coupled Polypropylene under an ISO 9000 Quality Management system. Each adapter is bagged and labeled for cleanliness and ease of identification. The CPP glass coupled Polypropylene material is rated to 150psi and suitable for most chemicals carried in IBC Totes.