Features: Replace plastic faucet Food-grade materials, safe and non-toxic Easy to install and well sealed Knob switch adjusts water flow Suitable for wine bottles, juice bottles, water tanks / buckets, outdoor water, etc. specification: material: plastic Opening diameter: about 2 cm / 0.79 inch Torque switch diameter: about 4 cm / 1.57 inches Total length: about 7 cm / 2.76 inches The package includes: 1 x faucet 1 x opp bag note: Due to manual measurement, please allow 1-5mm error. Item colors may vary slightly, because different monitors, please understand. Thank you!