you should give them a call and ask - I've used Steele for door seals on 2 pu cabs and 2 panels, worked fine, but weren't differentiated that way ... I'd suggest the 'small type', as I know there are seals other than Soff-Seal that are too thick
as a comparison if you talk to them, the seals I've used are the same shape/size as the ones for the panel barn doors, which I've also got from Steele
Bill