About this item MACHINE CALIBRATED PLATES: These durable, machine-calibrated plates are within 10 grams of the stated weight. Their slimmer design allows you to stack multiple plates and are color-coded according to the competition color scheme. COLOR-CODED WEIGHTS: The Calibrated KG Steel Plates come in a variety of color-coded weight increments from 0.25 KG to 50 KG featuring bright chrome, black, white, green, yellow, blue, and red powder-coated finishes. CALIBRATION PLUGS: These durable cast-iron steel plates are accurate to within 10 grams of weight. Featuring calibration plugs on the back of each plate to allow for greater precision. DIMENSIONS: This plate weighs 0.25 KG or 0.55-pounds and is sold as a pair. It measures 111 mm (4.4-inches) in diameter with a 5.5 mm (0.21-inches) thickness. The collar opening features a 50.6 +/- 0.2 mm diameter making it compatible with Olympic barbells. › See more product details