Features: Material: glass Size: Two tube spacing: 1cm; height: 4.5cm Function: It can prevent the carbon dioxide and oxygen hose from being crushed by the self-weight on the cylinder glass, without ventilation, crystal clear and beautiful. The problem of inconvenience and excessive bending resistance of the pipeline at the top of the aquarium is solved. Suitable for large angle bending of the refiner and gas stone inside the aquarium. Applicable to the aerated oxygen pipe used for aquarium, CO2 gas pipe, etc. 4*6 standard gas pipe" Package Included:  1 xU Shape Glass Tube   Note:  1.Due to the light and screen difference, the item's color may be slightly different from the pictures. Please understand. Make sure you don't mind before you bid.  2.Please allow 1-5mm differences due to manual measurement
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