... color and size 3.Certificates:LFGB,FDA,CE Dual lumen tube / double lumen silicone tube Material100% Silicone Raw MaterialColorSemi-transparent or customizedShore Durometer ... °C (special)Appearance of the TubeWall Thickness of the tube is even ,smooth surface,no cracks,no air bubble ... . Fuzhushan industrial park, Liaobu, Dongguan,China,523425 double lumen tube, double silicone tube, silicone lumen tube