10K Dana Spicer with 12-1/4" x 5" Air Brake
These parts are found on some lift axles and trailer axles with Spicer 12.25" x 5" air brakes. Traditionally, the M12WA115 brake drum and A10HU110X hub have been very expensive and difficult to find. We have the brake drum and can get the hub, and the prices are much better than they used to be.
This may not be the only Dana Spicer wheel end that uses a 12.25 " x 5" brake, so you should check your parts against the parts we list here. Be sure that you're ordering the right stuff. We'll be glad to help you, if needed.