Prusa Extruder Clearances?

I am thinking of using the sequential print feature for some smaller parts (0.75" tall). The default settings for extruder clearance are 45mm radius and 20 mm height.

20mm = 0.787 in - just slightly higher than my smaller parts.

If the defaults are correct, it looks as though I could get away with sequential printing without collisions? Using PETG so don’t want stringing from part to part if possible…