We never found one...it is just in how the person selling it lists it. 3011 is the model DS stands for double slide, which they all have "F" means Ford chasie
__________________ Jill and Wayne
BTC2
Forester 2014 3011DS
Yes...ignore all the letters, they really mean nothing (well, they do, but not anything special). We had to have a corporate model number and that's it. A 3011 is a 3011DS and 3011DSF.
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