Description:E-clips, also known as "e-rings," are used to secure parts onto a shaft. They fit into grooves in the side of the shaft for a snug fit. E-clips come in different types depending on specific application needs.Specifications:Outer Dia.:17.5mm/0.68inch;Inner Dia. : 8.9mm/0.35inch;Thickness (t): 1mm/0.04inch;Material: Carbon Steel Color: Black Package Includes:30 Pcs x E-Clip