Product size: square hole inner side length: 7mm x 7mm. The square hole size of the shut-off valve is important for correct installation; please verify before purchase. High-quality material: The faucet handles are made of cast iron with a red painted finish. This faucet valve is durable and resistant to rust. Easy installation: Featuring a sturdy square stem design, the water valve allows for smooth operation and quick, tool-free installation. Wide range of uses: These valve handwheels are suitable for replacing indoor and outdoor faucet handles, including garden faucets, yard faucets, bathroom faucets, toilet faucets, kitchen faucets, and drain faucets. Package includes: 2 faucet knobs. Screws are not included. Note: All measurements are manually taken; please allow 1-3 cm variation. Due to differences in lighting and display settings, actual color may vary slightly from the image. Please refer to the physical product upon receipt.