Monoblock Flexi Connectors

[arryB]

Hi. I'm refurbishing my utility room and fitting new worktop and sink/drainer.
Thought I'd use flexi tube this time so bought a pair of 15mm steel braided 10mm tap fit.
The pair are overall the same length but one of them has a 20mm steel end whilst the other has just the finished crimped end.
Can anyone please tell me why they have this difference.

arryB

 

[Charnwood]

To make fitting easier.
Fit the one without the stem first.

 

[RUBICON52]

Don't over tighten them.