seal o ring 1.Good quality seal. 2.Best quality. 3.Water&air,water proof, & durable. 4.Any color available. Rubber Seal O Ring Machines(20sets)Rubber mixer, Automatic slitting machine, Slicer, Flash device, molding equpment etc.Main productso rings, gaskets,custom rubber parts.Material Nitrile(NBR), HNBR, EPDM,Silicone, Fluorocarbon, SBR, Neoprene(CR),Butyl(IIR),NR,PU etc.Material ...