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通過認證 
We have developed the component for all our solar roof vent and solar lo vent, the extending sleeve for user who needs to extend the bottom of these ventilators in order to install it with a longer sleeve under it.
The Extending Sleeve is made of ABS Plastic. It can be connected in series to further extend the length of bottom sleeve. We this sleeve as an optional components for all our solar ventilators for models of SVT-012, SVT-012S, SVT-212S, SVT-015, SVT-015S and SVT-215S.
