where2find->jackstand.... adjustable tops and threaded-rod, tube-inserted extensions, but not the tubes ?
 

I know Brownell has the tops.

We're building a hauling trailer and need to now implement the lateral
support for transit.

Who makes the heavy duty, threaded screw in/out.... extension tops, as
are found on hydraulic jacks ?

Appreciatively,
Courtney Thomas
--
s/v Mutiny
Rhodes Bounty II
lying Oriental, NC
WDB5619