JBLProSilent Aeras Micro S3 is a set of 3 coloured air stones for use in fresh and marine water:
JBLProSilent Aeras Micro S3:Do you have questions about this article ?
+ made out of a extra fine pored silica sand mixture for outstanding fine air bubbles
+ consisting of 3 colored air-stones
+ cylindrical shape with large surface
+ 26 x 15 mm effective surface
+ for fresh and salt water