Air Stone is made of high-quality non-toxic mineral material, which is very safe, strong and durable, can generate uniform and tiny air bubbles, and has a high dissolved oxygen rate, reducing carbon dioxide and increasing PH value; and can be easily cleaned for reuse .
XL: 15 CM (150 x H27mm)
L: 10 CM (100 x H15mm)
M: 8 CM (80 x H16mm)
S: 4 CM (40 x H15mm)
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