Bergman Specialty Products can handle all of your Pneumatic seal needs to include all materials.  We provide special sizes in metric and standard.  When you are rebuilding that cylinder, we can provide such brand names as Merkel, Hallite, Chesterton, Parker, poly seal Garlock  and Simirit.  Bergman has a wide variety to choose from for your back up rings in nickel, bronze, glass and stainless filled materials.  We also can provide the proper wiper, poly seals, u-cups, v-sets, and piston cups in leather, Buna, NBR, Viton, Epdm, Teflon, and Urethane.  Next time you need a solution to your sealing needs call Bergman Specialty for fast quotations, quick turn around, and excellent service.