Al, Frank is right, but also tell NAPA the width of the belt that you would prefer. I found out that the best NAPA belt for my 28 M-2 that gives me the full one inch width is No. 070390. Fritz Kuenzel
Al, I forgot to add one word of caution. These new style belts are great and should last a long time, but unlike the old belts, they have little or no stretch to them. One should be carefull not to adjust them to tight for fear of overheating the fan bearing. Fritz