Aquarium CO2 System Generator Bottle Cap Fish Tank Live Plant DIY Air Diffuser Tool Carbon Dioxide Reactor

Function: Suitable for all kinds of DIY reactors, directly tightened carbonated beverage bottles
safe, durable, and air-tight.

Specification:
size: about 3.4 x 3.2cm
Material: ABS
colour: As shown

Package Contents:
6 x Quick screw cap

Only the above package content, other products are not included.
Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.