silicone rubber tubes pass FDA 1.Terials:NBR,silione,NR,SBR,etc 2.Various types and color are available 3.Good quality silicone rubber tubes pass FDA 1.Terials:NBR,silione,NR,SBR,etc2.types of O-ring,E-type,U-type,etc,can make on you size3.Different sizes of Oil Seal,Rubber Seal, Rubber Gasket,O-Ring,etc4.You could option the color you like on the Oil O-Ring,Oil seal,Rubber Seal,Rubber Gasket: ...