... .Water&air,water proof, & durable. 4.Any color available. Rubber Seal O Ring Machines(20sets)Rubber mixer, Automatic slitting machine, Slicer ... ), HNBR, EPDM,Silicone, Fluorocarbon, SBR, Neoprene(CR),Butyl(IIR),NR,PU etc.Material PerformanceRebound resistance, Tear Resistance, Abrasion Resistance, Impact Strength ... /CDeliver time7-15 daysMore information Please contact with us Rubber Seal O ring