When shipping oversized items, fragile items or orders containing multiple items, we reserve the right to change your shipping option of Next Day Air, or 2nd Day Air, to Ground Shipping. You may be required to pay more than the advertised shipping cost if your order contains oversized, heavy, or multiple items. If we find that your package would arrive sooner by ground, we will change your shipping option and refund the difference in cost. In the event that your Next Day Air or 2nd Day Air Order is back-ordered, we will ship the back ordered item Ground once back in stock. Express orders placed before 1 pm will be shipped the same day.