Hole diameter: 1.37 ''(35 mm)   Universal Design: The faucet hole cover plate is perfectly matched with Lefton's faucets, and can be installed on a single-hole or three-hole sink to improve the appearance of single-hole faucets and sinks. Quality Materials: Durable stainless steel construction, ensuring quality and longevity. Easy to Install: Can be installed and used directly without any tools.