This is a very nice Hinterfeld tiny Co2 Glass Checker. 

• Made of quality glass.
• No suction cups required. Simply hang it on the edge of your planted aquarium.
• Easy maintenance， since it is not under water， it won\'t grow algae on the glass.
• Size is shown in one of the photos， please refer to the photo for sizes.

Instruction:

• 1. Simply add couple drops of test solution and water into the checker.
• 2. Hand the checker on the edge of the aquarium.
• 3. Ensure water level cover the opening of the checker.

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Unit Type:

piece

Package Weight:

0.100kg (0.22lb.)

Package Size:

20cm x 10cm x 5cm (7.87in x 3.94in x 1.97in)