3.5K Straight axle.   2 3/8" diameter.

This is the axle only.  Hubs, mounting kit and springs sold separately.  

There is a $15 set up fee and shipping is EXTRA.  If ordering multiple axle components (hubs, springs, etc.), the $15 drop ship fee from each component will be applied to shipping and deducted from second invoice.  Estimated shipping is $35 to $50.

Be sure you've chosen the correct weight rating for your application (2K or 3.5K).  Then order based on the "Hub Face to Hub Face" measurement.  

To determine the Hub Face Measurement (HFM), you need to know the following.

Inside Width (IW)
Wall Thickness (WT)
Desired Tire Clearance (TC)
Wheel Offset (WO)

IW+2(WT)+2(TC)+2(WO)= (HFM)

When in doubt round up!  Most people order the 60.25" 2K for a 4 foot wide teardrop.