Shimon,
Here's the listing from the Motorcraft website. They list four different belts. Hope this helps!
Paul
JC634LA1 V-Belt
FAN & AC
TOP WIDTH 16/32", CIRCUMFERENCE 63 4/8"
JB315 V-Belt
ALT & VP
TOP WIDTH 15/32", CIRCUMFERENCE 31 5/8" - w/o AIR COND
JC584A1 V-Belt
FAN, ALT & AC
TOP WIDTH 16/32", CIRCUMFERENCE 58 4/8"
JC604L1 V-Belt
FAN
TOP WIDTH 16/32", CIRCUMFERENCE 60 4/8"