It is a durable and decorative glass-made check valve. The valve is produced from a mineral close to Ruby, and it does not deteriorate from long-term use. Moisten the mineral before installation.
You can make your aquarium more stylish by adding a Cabochon Ruby to the CO supply system. Please enjoy Nature Aquarium with an aquarium
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ADA Cabochon
Love this ADA check valve. It is very small but you can't beat ADA quality