Made of materials and durable. It is designed to withstand the harshest conditions and provide reliable performance over time. [Product content and dimensions]: Bolt size: 5/16; Overall depth: 2-5/8; Internal depth: 1-7/8; Flange inner diameter: 3-1/2; Flange outer diameter: 5-1 /4. [Replacement]: Our hubcaps are compatible with STEMCO 343-4024, replace Chicago Rawhide 1612, 1711, 1811, 506085, D0HZ1131C, / 806994, 858381, 8069924, 921010002, 19QJ334, 19QJA2 9302, MCI 15L523, ETC [Excellent Seal]: Our replacement hub caps feature high-quality seals that a tight and secure fit, preventing dust, water, and other debris from entering your hub. This helps extend the life of your wheel bearings and avoid costly repairs. [TRANSPARENT OIL WINDOW]: With our hub cap replacement, you will be to easily monitor the oil level in your hub thanks to its transparent oil window. This keeps your wheel bearings properly lubricated and helps prevent damage caused by insufficient oil. Color: silver Material: Aluminum Package Contents: 2 PCS Hub Caps with Gaskets and Plugs 2 PCS Plugs Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.