... 2.Spec: Molded, OEM 3.different colors, sizes Features of Custom silicone rubber plugs for hole 1) Material: NBR, NR, EPDM, silicone ... under the standard tolerance.About usWe specialize in manufacturing various rubber products, plastic products, silicone products, zinc / aluminum alloy products with ... inquiries and emails will be replied within 24 hours.Thanks! Custom silicone rubber plugs for hole