άξονα αέρα με επέκταση λωρίδες
Thanks to the exclusive design of air shaft with key strips , air bag and expanding strips are easily to replace without having to dismantle the shaft head. When air bag swells by air, the outside diameter of air shaft’s expanding strips expands to get stuck with inside diameter of paper tube. The steel body has a standard size and specification(as shown in below chart).
This product is customerized.