Meet the SM 10 Sheet Metal Grommet from Metro Moulded Parts, known widely as Wire Protector Ring or Hole Plug for its adaptability. Measuring 9/16" O.D. and 3/16" I.D., it elegantly fits a 5/16" hole. Crafted with the latest rubber compounds, this grommet is designed to resist chemicals, sunlight, and ozone, ensuring long-term functionality and durability. Engineered to sit perfectly snug, its flexible rubber composition allows easy installation by simply pushing into place, securing wires or cables and preventing damage. Its understated style and robust build make it an essential accessory for a wide range of applications. Choose the SM 10 for unparalleled protection and peace of mind, bolstered by Metro Moulded Parts' "No Hassle" platinum warranty, offering replacements for 30 years. Experience quality that lasts a lifetime order yours today!