... size 3.Certificates:LFGB,FDA,CE Dual lumen tube / double lumen silicone tube Material100% Silicone Raw MaterialColorSemi-transparent or customizedShore ... of the tube is even ,smooth surface,no cracks,no air bubble,no impurity, odourless and non-toxic.CertificatesFDA,SGS, ... Minkang St. Fuzhushan industrial park, Liaobu, Dongguan,China,523425 double lumen tube, double silicone tube, silicone lumen tube