Due to the exchange rate fluctuated, and raw materials not stable, and nowadays fierce competition, so the price is valid only 1month most of the time, and some even shorter to 15days or 1weeks, which is up to the on time situation.
Due to the exchange rate fluctuated, and raw materials not stable, and nowadays fierce competition, so the price is valid only 1month most of the time, and some even shorter to 15days or 1weeks, which is up to the on time situation.