[Python] Looking for specific values in nested loops

I am only looking for a logic to look for the increasing values of w,l pairs, for example, l=80, w=100 , bl=all_values, and then the next pair is l=180, w=400, bl=....

What kind of logic could I use in between bl loop and length to implement this?

import numpy as np

width = range(100, 2700, 300)
length = range(80, 900, 100)

bl = np.arange(0.9, 1.6, 0.1) # Floating-point range for bl_set

for w in width:
for l in length:
for bl_set in bl:
print("l=", l, "\tw=", w, "\tbl_set=", bl_set )

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