JBL ProSilent Aeras Micro M
"Green Airstone
• New: made out of a extra fine pored silica sand mixture for outstanding fine air bubbles (therefore named “Micro”)
• Long conical aerating stone with extremely high diffuser surface.
• Unobtrusive due to green coloring.
• Size S: 10 cm lenght; Size M: 14 cm lenght; Size L: 30 cm length
• For fresh and salt water
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JBL Aeras Micro M