Need information on the two different Rupp TC-1 covers

#1
Can someone help me on the difference lengths/sizes between the 70' and 71' - 72' TC-1 covers? I found a thread that mentions 13 1/2" overall length but they didn't know which one it was for, the 70' or 71'. Are the lengths the only difference or are the widths different also? Thanks.
 
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