8300 8400

As far as I know those are the model numbers but when the person from
sales sent me the serial Number. What I received was 840-06-66209. By the
way these are only used on that serial number and above. The way that
number breaks down is model-year-serial number.

 

12X4.5X8 smooth soft (85 duro) = RA1060703/001
12X4.5X8 smooth std  (93 duro) = RA1060703/107