Body: Injection Molded HPX® high performance resinFoam: 1.6pcf polyesterLatch: Valox - PBT polybutylene terephthalatePurge Body: Valox - PBT polybutylene terephthalateLid O-Ring: Silicone SpongePurge Vent: Gortex membranePins: Stainless Steel or AluminumPurge O-Ring: Buna-N , 50-60 Durometer Shore A