Adult respiratory tubes,got american FDA-approval and CE certificate. Material:hoses made of POE,fittings made of TPE. Adult respiratory tubes,got american FDA-approval and CE certificate.Material:hoses made of POE,fittings made of TPE.properties:innoxious medical hoses,good flexibility.RoHs approval.GH-2001&2002 are CE & FDA approval.hoses for medical usage transparent breathing tube