Specifications:
This CO2 bottle cap is suitable for most kinds of DIY reactor.
It is easy to use that you just need to screw the bottle cap on the drink bottle.
Plastic material makes it uneasy to rust and safe for your fish and water plant
With the 2 holes, you can add both tube and other tool like bubble counter or other things to help you control the process.

Item Name: CO2 Bottle Cap
Material: ABS
Features: Easy to Use, Anti-rust, Durable
Size: 3.5cm x 3.5cm x 3.5cm/1.38" x 1.38" x 1.38" (Approx.)

Notes:
Due to the light and screen setting difference, the item's color may be slightly different from the pictures.
Please allow slight dimension difference due to different manual measurement.

Package Includes:
1 x CO2 Bottle Cap