Authentic Comet 203591A belt.  For a less expensive version (but great quality), order aftermarket 10052.

Fits Kartco 607/609/667/669/657/659.  Replaces Kartco 7655.  Fits most 5 - 6.5 Yerfdogs with a Comet torque converter and a 7" driven unit.  Replaces Yerfdog Q43203W.  Do not use on Yerfdogs with a Max-Torque torque converter (they use 84-028).

Same as 203591C;  there is no difference in the "A" and "C" belts -- the letter is strictly a marketing path identifier.