Manufacturer Back Order means we have some of this item on order however the manufacturer has indicated they have a delay. Most often this delay is only a few days but it could be a week or much much longer depending on their holdup for the manufacturer. Unfortunately it is difficult to provide all the back orders estimates however for a better estimate on this item feel free to call our expert staff at 800-242-4424 we will also provide an updated shipping estimate with any order that has a Back Order.