Therefore, for SF4004J COL.20,Since the coating is TW REVO,As you know TW REVO is not much stable compare with flash REVO.The factory sure that the coating on this style is TW REVO as previous order.We will check the delivery date for 100pairs S20 BK-RED TW REVO.We’re very sorry to happened this situation. We have asked the factory to be careful to avoid the problem happen again.