Mazda 3 Winter Tire Center Hub Cap

Winter steel rims do not come with center hub caps and I believe none are available at a reasonable price. I wanted to hide the heavily rusted wheel spindle hub assembly and also wanted to prevent further exposure to our heavily salted roads.
Mazda 3's have a (5) lug 4.5" (114.3mm) offset and 21mm nut.
I designed the center hub caps and wheel nut covers as separate pieces so that they could be printed on my smallish 3D printer bed and also easily replaced if damaged.
(5) wheel nut covers