Buy the larger set. I have 2 sets ... they are the same size according to the box. But the white set is a loose fit and the black set is a snug fit. Both do the job just fine but the difference tells me there is a lot of tolerance in the manufacturing process. /ken
Ken & Deb (WIT Club, FMCA, SKP, Harvest Hosts, and grateful volunteers with SOWERs)
2005 Winnebago Vectra 40FD w/400ISL and Allison 3000MH on Freightliner's Evolution chassis, Onan QD7500, 1000w Renogy solar, BlueOx tow gear, and 2015 Cherokee TrailHawk toad.