When your Sleep Number Select Comfort bed is missing a part, the decision usually comes down to whether you are replacing the air system itself or the hardware that keeps the mattress in place. Two used parts in this face-off sit at opposite ends of that spectrum: a half air chamber for a king mattress priced at USD 124.99 and a retainer bar hardware set priced at USD 13.99. Both share the Sleep Number name, both are pre-owned, and both are made in the United States, but they serve very different roles in your sleep comfort setup.
Quick verdict
The Select Comfort Sleep Number 1/2 Air Bed Chamber for King Mattress S-815 E-King is the functional core if you need to replace one inflatable side of a king-size bed. It is a single chamber with an air bladder, motor pump, and adjustable firmness, and it includes two air ports and two white caps. The Sleep Number Select Comfort Mattress Retainer Bar Hardware Set of 2 is the lower-priced fix when your bed already has its air system and you just need the retainer hardware around the mattress.
Comparison at a glance
| Point of comparison | Select Comfort 1/2 Air Bed Chamber | Retainer Bar Hardware Set of 2 |
|---|---|---|
| Listed price | USD 124.99 | USD 13.99 |
| Product type | Half air bed chamber for a king mattress | Mattress retainer bar hardware set of 2 |
| Size wording | King, model S815 E-King | Full XL |
| Condition | Used | Used |
| Country of origin | United States | United States |
| Extras | Two air ports, two white caps, adjustable firmness, inflatable, single chamber, air bladder | Two pieces |
The price gap is about USD 111. That difference matches the scale of the two jobs: the chamber is a large, inflatable component, while the hardware set is a smaller frame-related piece.
Where each part stands out
The 1/2 Air Bed Chamber stands out as the substantial motorized part of the pair. Its features emphasize adjustable firmness, inflation, and the motor pump, making it the obvious pick when the air holding side of the bed is the problem.
The Retainer Bar Hardware Set of 2 stands out as the targeted, lower-cost part. The Full XL size makes it a straightforward spec to match. It is the part to consider when the mattress-retaining hardware needs attention rather than the air bladder.
Product notes
Select Comfort Sleep Number 1/2 Air Bed Chamber for King Mattress S-815 E-King
This used half air chamber is the heart of a king-size Select Comfort setup. It is a single air bladder chamber with a motor pump and adjustable firmness, and it includes two air ports and two white caps. The beige chamber is made in the United States, and normal used wear such as minor discoloration, marks, and scuffs can be expected. Choose this part when your project centers on replacing one side of a king air bed rather than fixing frame hardware. The trade-off is its size and condition: this is a core replacement, not a quick frame trim.
Sleep Number Select Comfort Mattress Retainer Bar Hardware Set of 2
This retainer bar hardware set is the targeted piece you would add when the bed frame's mattress-retaining hardware needs attention. It is a used set made in the United States under the Sleep Number Select Comfort model, with Full XL as its stated size. Pick this part if you are troubleshooting the retaining hardware rather than the air chamber itself. The limitation is scope: a hardware set like this addresses the bar side of the bed, while air chamber, air bladder, and pump needs fall to a separate part.
Final choice by use case
If you need to replace one side of a king Sleep Number air bed, the 1/2 Air Bed Chamber is the part to order. If you are working on the retainer hardware around the mattress, the two-piece retainer bar hardware set from Sleep Number is the lower-cost pick. Match the part to the problem: the air chamber for the air holding side, the hardware set for the frame side.
