... size 3.Certificates:LFGB,FDA,CE Dual lumen tube / double lumen silicone tube Material100% Silicone Raw MaterialColorSemi-transparent or customizedShore Durometer A30shoreA- ... surface,no cracks,no air bubble,no impurity, odourless and non-toxic.CertificatesFDA,SGS,LFGB,CE, LMBG, PAHs<0.2 ... industrial park, Liaobu, Dongguan,China,523425 double lumen tube, double silicone tube, silicone lumen tube