Material Chrome Plated Steel Unit & Package Sold by each, color plastic bag Chrome Plated Steel I.D. Height Description 20170 7-1/4" 2-3/4" 7-1/4" dia. axle, 12 of 1/2" studs 20180 8" 2-3/4" 8-1/2" dia. axle, 8 of 5/8" studs, also fits "Peterbilt" 1995 up Part No. & Image Selection Rear Hub Caps in Classic Shape Part No.: -- Please Select -- 20170 20180 Combination of product variants is not available Updating... Related Products Trailer Hub Caps Stainless Steel One Piece Rear Light Bars with Oval (6) and 2″ (5) Round Lights Bugler/Swan Wonderwing Hood Ornaments LED Glow Base for Grand General Swan Hood Ornament Screw Head Covers Palm Tree License Plate Frame