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 check it again. High quality material: The faucet handles are made of cast iron painted with red paint. This faucet valve is not easy to break or rust. Easy installation: With the sturdy square stem design, the water valve is easy to open/close and allows for easy installation. save labor. Wide range of uses: Our valve handwheels are widely used as replacements for indoor and outdoor faucets and valve wheel handles for garden faucets, yard faucets, bathroom faucets, toilet faucets, kitchen faucets, drain faucets, etc. Package includes: you will receive 2 faucet knobs. Screws are not included. Note: The data is all manually measured, please allow 1-3cm error Due to differences in light and display, there may be some differences in color, please refer to the actual item received.