Why these numbers
Elegoo PLA Silk starts from Bambu's PLA Basic reference; Elegoo's published specs are overlaid where available, and everything else stays at Bambu's calibrated default.
Hardened steel nozzle, ≥0.4 mm; melt index 28.7 (3× std PLA); tensile X-Y 26 MPa, Z just 5 MPa (anisotropic)
Treat these as a starting point — run a flow-test cube and Bambu's Flow Dynamics calibration after import for the last few percent.