[Complete 4-Piece Repair Kit] Includes 2 High-Pressure Testing Caps and 2 M236 Male Connectors with new O-rings. A full solution for testing and repairing your Sleep Number bed's air chambers. [Accurately Test for Air Leaks] Use the sealing caps to isolate and pressurize the air chamber. This helps you quickly diagnose whether a leak is in the chamber, hose, or pump, saving troubleshooting time. [Replace Broken Connectors] Swap out old, cracked, or leaking original M236 fittings on your bed with these new connectors. Restores a perfect seal in the air line for reliable inflation and firmness control. [Wide Mattress Compatibility] Designed to work with many Sleep Number bed models (including King, Queen, FlexTop, etc.) as a direct replacement for OEM M-236 parts or for system testing. [High-Quality & Ready to Use] Each piece is brand new and individually packaged. Made from durable materials to ensure a secure seal and long-lasting performance right out of the box. [Cost-Saving DIY Repair] Avoid the high expense of a whole new air chamber or a service call. This kit empowers you to easily test and fix common air leak issues at a fraction of the cost. Is your Sleep Number bed losing air, not holding firmness, or have you discovered a broken air fitting? Diagnosing and fixing air leaks is simpler than you think with this essential repair kit. This 4-piece set provides everything you need to professionally test your air chambers and replace faulty connectors. It's the smart, affordable alternative to costly replacements or service visits. [Two Primary Uses - Test & Replace] TEST FOR LEAKS: Use the two High-Pressure Sealing Caps to close off the air chamber ports. This allows you to isolate the chamber, inflate it, and monitor pressure to confirm if it's holding air or if the leak is elsewhere (like in the hose or pump). REPAIR CONNECTIONS: The two M236 Male Connectors come with fresh O-rings. Replace any worn, cracked, or leaking original connectors on your bed's air system to restore a perfect, airtight seal. [Step-by-Step Guidance] For testing: Fully inflate your bed, remove the pump hose, and immediately screw a sealing cap tightly onto the air chamber port. Observe over several hours or days to check for pressure loss. For storage: Always cap off unused air chamber ports to prevent the inner material from drying out and to keep dust/debris from entering. For replacement: Simply disconnect the old M236 connector from the hose or chamber and install the new one from this kit. Ensure the O-ring is in place for a leak-free connection. [Why Choose This Kit?] Our parts are manufactured to meet strict quality standards, ensuring a secure fit and reliable performance. This universal kit is compatible with most Sleep Number beds featuring the standard M236-style ports, including various King, Queen, and FlexTop models. Take control of your sleep system's maintenance. Order this repair kit today to quickly diagnose problems, perform lasting repairs, and enjoy a perfectly firm mattress night after night. [Important Compatibility Note] This product is an aftermarket replacement part designed to be compatible with Sleep Number beds. Sleep Number is a registered trademark of Select Comfort Corporation. This product is not manufactured or endorsed by Select Comfort Corporation. The use of trademarked names is for identification and compatibility reference only.