Why these numbers
Amazon Basics PLA Filament 1.75 mm (1.25 kg) starts from Bambu's PLA Basic reference; Amazon Basics's published specs are overlaid where available, and everything else stays at Bambu's calibrated default.
Identical specs to standard PLA; larger spool (ASIN B07SZLYWSN)
Treat these as a starting point — run a flow-test cube and Bambu's Flow Dynamics calibration after import for the last few percent.