Hi John,
The BP-MBEML fittings fit for OD12mm hard tubing.
And BP-NCPLT16-L1000 is the OD16mm hard tubing.
So they are not compatible.
And OD13mm hard tubing is not compatible with BP-MBEML too.
We have the pre-bend OD12mm acrylic tube here.
And the OD12mm hard tubing and fitting kit too.
If you have any questions, feel free to contact us.
https://www.newegg.com/p/2YM-0001-003R4?item=9SIAEMWEYC1618
https://www.newegg.com/p/37B-000X-004M4?item=9SIAEMWBDA3860