The RRH-40-20-50 is a retention ring from Essentra Components, a global manufacturer of plastic and metal components for a variety of industries. This retention ring is a standard size, with an outside diameter of 40mm, an inner diameter of 20mm, and a maximum thickness of 50mm. It is primarily made from plastic materials, with a simple design that allows for quick installation. The ring is designed to grip the outside of most components or housings that it is used with, and once installed, provides a secure, low-profile grip. The ring is commonly used in a variety of industries, including automotive and HVAC, for applications such as mounting sensors, attaching control arms, or securing filters.