One black, composite, oil fill hub cap. Includes mounting gasket, window, vent plug, side pipe fill plug, and 6 mounting bolts. Light weight, high impact composite body resists salt, chemicals, corrosion, and UV damage. Magnetic side fill plug with O-ring helps trap metal deposits to protect seal and bearings. Vented one-way center plug valve seals keep out contaminants. Embedded aluminum ring evenly distributes mounting load. Molded pressure ridge on flange surface helps ensure a leak proof seal. Molded pressure ridge improves sealing ability. Bolt holes = 6, bolt circle = 4 1/2”, bolt hole size = 5/16”, fit = steer Interchangeable with: SKF️#1612 SKF️#1711 Stemco️#343-3024 Approximate dimensions = flange OD 5 1/4" flange ID 3 1/2" height 2 5/8" Approximate net weight = 11 oz *Replaces Ford 97591612 F81A1131BA 93001612 96581612 *Replaces Freightliner 1612 CHR 1612 XCR 1612 *Replaces Kenworth CR1612 *Replaces Peterbilt CR1612 *Replaces Volvo 23873065 20388298 23873065