Flat Rubber Drive Belts. Popular in, VCR, Reel to Reel, Turn Tables,
Audio Cassette Players, Record Players,
Camcorders, Car Stereos, CD Players, Computer CD Drives, DVD Players, and Projectors.
FR=Flat Rubber Belt. The following letter refers to the width of belt.
S (Small)=1/8" Approx., M(Medium)=3/16-.25" Approx., L(Large)=.375" Approx.
The last numbers refers to the length of belt. This would be the circumference measured in inches. You can also cut the belt and layout on a ruler for measuring. (Note: not diameter)