We manufacture a range of Large Rubber O Rings for the construction industry. Ema Rubber Industries can make O rings up to 40 inches Diameter for a variety of sealing applications. We can produce O Rings in Nitrile, Neoprene, Silicone, Viton, and many other polymers, and will suggest the best possible sealing solution for you. Production can be in large quantities or small. We have a fast tooling turn around time and can produce flashless O Rings that can be used where even the smallest tolerances are important.