Break line in Multi Cell FPDF with various text properties

I’m trying to make a box which contains 2 lines of text which have their own text properties using FPDF library :

I know i can use the multicell here,
but how about text property like text size and font family ?

This is my current code :

public function print()

{
    $this->fpdf->AddPage('L',[100,150]);
    
    $this->fpdf->SetFont('Arial','B',16);
    $this->fpdf->MultiCell(130,8,utf8_decode('Material description :' . chr(10) . 'V-001940 LCMS AA001'),1);
    
    $this->fpdf->Output();
}

my current output :

current output

expected output :

expected output

Is it possible to do this ?

and also its strange that when im using the ‘n’ to insert breaks, nothing happened, hence i need to use this line of code instead :

utf8_decode('Material description :' . chr(10) . 'V-001940 LCMS AA001')

What is the solution ?