Many thanks !

If you click on the options, the description changes.  Currently they are:

A - Front axle tube only 1 3/8″ 14 swg ( 2mm). Bent as top image for customer to fit king pins.

B - Front axle tube 1 3/8″ 14 s.w.g ( 2.mm) with plain bore king pins welded.( Nylon top hats and king pin bush required). As bottom image.

C - Front axle tube 1 3/8″ 14 s.w.g ( 2 mm) with plain bore king pins welded.  Comes with self colour O/S and N/S 25 mm stub axle and yolk assemble with 2 x king pin bush / 4 x top hats and 2 x king pin bolts.
If you would prefer 17 mm stub axle please contact us.

D - Front axle tube 1 3/8″ 14 s.w.g ( 2.mm) with ball bearing king pins welded.( Ball Bearings and spacer required)

E - Front axle tube 1 3/8″ 14 s.w.g ( 2 mm) with ball bearing king pins welded.  Comes with self colour O/S and N/S 17 mm stub axle and yolk assemble with 2 x king pin spaces/ 4 x ball bearings and 2 x king pin bolts with M 10 nylocs.  Please indicate if you want 62 or 70 mm stub axle length.

Both work.

My first axle had the poly bushes because bearings weren't an option then.  I ended up replacing the bushes with Oilite but that was probably my doing.  The thing to remember is that you want the yoke and the "anti-crush" tube to all be tight together (ie the bolt should pull them tight against each other and move as one unit).  You can then tweak the bushes if you need to.

The axle set we bought (for Marek's cyclekart) has the bearings.