... 2.Various types and color are available 3.Good quality silicone rubber tubes pass FDA 1.Terials:NBR,silione,NR,SBR,etc2 ... ,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:Black,red,white,yellow,brown,green,vioet,etc,depending ...