Plastic tubing specialists for 40 years Since 1970, Excalibur has manufactured plastic pipe and “machined” nipples for irriga ... tion, vacuum tubing for central vacuum systems and plastic cores used in various medical applications or in products such as brushes and film. Proudly based in the USA, we strive for higher standards of quality control and customer care by continually re-evaluating and improving all of our processes. And to fill your order fast and efficiently, Excalibur maintains an extensive inventory. We know that just-in-time delivery is critical to the success of our customers, no matter what the industry. read more