silicone rubber tubes pass FDA 1.Terials:NBR,silione,NR,SBR,etc 2.Various types ... color are available 3.Good quality silicone rubber tubes pass FDA 1.Terials:NBR,silione,NR,SBR,etc2.types of O ... Oil O-Ring,Oil seal,Rubber Seal,Rubber Gasket:Black,red,white,yellow,brown,green,vioet,etc,depending on you own ... for producing samples: 3 - 15 days silicone rubber tubes pass FDA