Description: It is suitable for all kinds of DIY reactors. Easily to set up,low cost and excellent quality.can be used for a long time. Can be directly screwed onto carbonated beverage bottles for safe, durable and airtight. Add and control the amount of CO2 available to your fish and plants,add essential CO2 into your aquarium water. Material: Plastic,Size:Approx.3.3x3cm / 1.30x1.18inch Package Includes: 5 pieces CO2 DIY Reactor Bottle Cap Note: 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
