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.:4mm/0.16inch;Inner Dia. : 1.2mm/0.05inch;Thickness (t): 0.5mm/0.02inch;Material: Carbon Steel Color: Black Package Includes:30 Pcs x E-Clip