Welcome to Aberdeen O-rings & Seals Aberdeen O-Rings & Seals (AOS) stock and distribute O-rings, seals and associated components from a wide range of materials, with the shortest lead-times in Scotland. We can supply virtually any seal, in any material, and can assist with the design and manufacture of custom parts for all seal applications. We have no minimum order quantity and will not be beaten on quality! Our continual investment and development of product, personnel and customer satisfaction ensures we remain unrivalled in our field for quality and service.