The most common materials utilized in producing our rubber grommets are commercial grades of SBR or Nitrile, however, they can also be produced in various other commercial materials, such as Silicone, Neoprene1 and EPDM. In addition, all of the above materials can be provided as specification grades such as, but not limited to, NASM 3036 (formerly MIL-G-3036), A-A-59588 (formerly ZZ-R-765), MIL-R-6855 and ASTM-D-2000. For additional information regarding available materials, their application, tolerances, colors, etc., click on the link to our Resource Page located on this, as well as all other pages of our site.