Features: *Carbon Dioxide Regulator:This product includes a solenoid valve coil. Specifically designed for fish tankcarbon dioxideaccessories. * 8mm Outer Diameter of Thread:The product features an outer diameter of thread measuring 8mm, ensuring compatibility and easy installation. *Function:Thiscarbon dioxideaccessory provides efficient and precise control ofcarbon dioxideflowing, promoting optimal growth conditions for aquatic plants. * 13mm Wrench Position:The product is equipped with a convenient wrench position measuring 13mm, allowing for easy adjustment and fine-tuning ofcarbon dioxideflowing. *Optimal Total Length:Measuring a total length of 52mm, thiscarbon dioxideaccessory is compact and space-saving, making it suitable for various fish tank setups. Specifications: *Product Name:Solenoid Valve Coil *Material:Metal *Size:About 52 mm( Total length ) *Color:Gold+Silver * Outer diameter of thread: About 8 mm * Diameter: About 9 mm * Wrench position: About 13 mm * Outer diameter of thread: About 12 mm Package Content: 1 * Solenoid Valve Coil Note: 1. The real color of the item may be slightly different from the pictures shown on website caused by many factors such as brightness of your monitor and light brightness. 2. Please allow slight manual measurement deviation for the data. _x000D_ _x000D_