dual lumen tube / double lumen tube 1.Material: 100% silicone 2.any color and size 3.Certificates:LFGB,FDA,CE Dual lumen tube / double lumen silicone tube Material100% ... C (special)Appearance of the TubeWall Thickness of the tube is even ,smooth surface,no cracks,no air bubble ... St. Fuzhushan industrial park, Liaobu, Dongguan,China,523425 double lumen tube, double silicone tube, silicone lumen tube