Cast Iron Olympic Weight Including 7FT Olympic Barbell, 300-Pound Set, Multiple Packages. The total diameter of the plate varies by size for easy recognition. 1x 7FT barbell, 255 LBS plates. 2-inch center, plates fit any Olympic bar. Plates have two hand shape holes for easy grip and comfortable workout.Made of high quality cast iron with a durable, baked enamel finish. All plates are labeled in both Pound and Kilogram for convenience. 300 pounds set: 1x 7 feet Olympic Barbell (45 lbs), 2x 2.5lb, 4x 5lb, 2x 10lb, 2x 25lb, 2x 35lb, 2x 45lb cast iron plates. Bar features multiple knurling positions and lengths for your convenience and safety, 700-Pound capacity. Plates are made of solid cast iron with a 2-inch center hole fits any Olympic bar with diameter 2" or less; Can be used with 2" dumbbell bars too. All plates features a durable, black baked enamel finish to prevent the plates from rust and corrosion without any unpleasant odor. The weight set allows you to do a wide range of exercises from squats to bench presses.