K1C TPU Issue

Hello, I am trying to print TPU but for whatever reason it will not feed into the nozzle. I thought it might have been something with the nozzle that came with the printer so i purchased the following nozzle:
https://www.amazon.com/dp/B0D3F38L2H?ref=ppx_yo2ov_dt_b_fed_asin_title&th=

When I try to feed the TPU into that nozzle without even installing it, it wont go into the barrel. What am I doing wrong? Can anybody please provide some guidance? I’m new to TPU.

As long as the filament is the usual 1.75mm filament you shouldn’t need any changes to the nozzle. Standard 0.4mm nozzle being easiest. I have printed TPU with 0,2mm nozzle, bit more difficult. Hardest thing on a corexy is the PTFE feed tube, it can be a little grippy for TPU, might want to feed direct into the printhead and bypass that tube.

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Which brand of TPU? I have great results with Pinuotu, Creality, Ziro but struggle a bit with Overture, could be just that one roll I guess.