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. UPC 840009219771 Color chrome Material Cast Iron Brand Name Titan Fitness Item Weight 1.25 Kilograms Part Number CALPLTP.25 Manufacturer Titan Fitness Number of Items 1