This is many the Best set you ever had a chance to ever buy... I never used them, but save them for that build... I need rehab myself if you haven't figure this out..:) Gibson generally used the same magnets (size/grade) which was available for their P-90 pickups as were used in the PAF Humbucker..as used in the Les Paul Grand ERA of Burst Tone!
The original PAF magnet length was 2.5" long. These came out od 1959 p-90 Les Paul Special. SAME Magnets as a PAF.. NO One on earth takes apart a 1959 PAF just for magnets.