-   Made of fire-retardant PVC material andhelix steel wire

-   Easily to connect due toflexible

-   Light Yellow tube with Black ScuffStrip

-   Duct with the buckle

-   Enduring the high temperature and oleicacid

-   Acid & alkali resistant andcorrosion resistant and fire resistant

-   Schlep easily wherever exhaust andinhalation the air in the field condition due tolight-weight

-   Prevent the workers from thesuffocating by improving dust air into fresh air 

Application

•   Manhole ,tunnel and tank
•   Ship building , under-ground project