These are 3.75 Centers for 15 and 16 inch, 6 lug wheels . If you need a different size, please let us know. We also have:

13, 14, 15 inch 5 lug 3.19"  Centers

15, 16 inch 6 lug 4.75 Centers

16 inch 8 lug 4.90 Centers

375 CLOSED CENTER CAPS WITH JAYCO SNAP-IN INSERTS PRICE IS FOR ONE CAP. THESE WILL FIT 6 LUGS WHEELS AS THEY GO IN FROM THE REAR OF THE WHEEL-FROM RV WHEELS . PLEASE MEASURE YOUR WHEEL FIRST. CAPS ARE 3.75 INCH CENTER BORE

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All Truck n RV Tire&Wheel

2437 Eddy St

Elkhart Indiana 46516