Description
Size: inner size* outer size
- 4mm*6mm (about 100meter) (standard size for mostly aquairum accesories, fitting, air stone, air pump)
- 5mm*8mm (about 100meter)
- 6mm*9mm (about 100meter)
- 8mm*11mm (about 65meter)
- 12mm*16mm (about 50meter)
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