... 2)different colors 3)custom made hole grommets 4)good quality, reasonable price Rubber Hole Grommets Sizeaccording to customers' specification(drawing ... ,NR,Neoprene,HNBR,Polyurethane,FVMQ,FFKM,Aflas, etc.DuroSilicone: 20~80 Shore A, others 40~90 Shore AColorany color as ... in the manufacturing kinds of rubber products for more than 20 years, wide varieties, rich materials, and custom rubber products ...