The Body Solid(R) Colored Bumper Plates feature superior durability with quality, smooth finishes and vibrant colors (green, black, yellow, blue and red). Constructed with the highest-standards in mind, these bumper plates are factory tested to withstand drops and heavy use. Power Up Diameter 450mm (17.72"), IWF Standard Collar Opening 50.7mm (2") Additional Details 1 Year Commercial Warranty Set includes 2 each of: 10 lb Green, 15 lb Black, 25 lb Yellow, 35 lb Blue, and 45 lb Red 10lb plate width 1" 15lb plate width 1 1/4" 25lb plate width 1 7/8" 35lb plate width 2 3/8" 45lb plate width 2 7/8"