When you are about to break a PR, every pound matters. Gorila Change Plates let you load in 1LB, 2.5LB, and 5LB steps, so your progression never stalls between fixed plate jumps.Each plate matches IWF standard colors with a 50.4 mm collar opening for a firm, secure hold on any standard Olympic barbell. The solid rubber coating over a metal core protects your barbell sleeves, keeps noise down, and extends the life of the plate itself. Weight tolerance is held to +/- 10 g, so what you load is what you lift.Add a single pair to your cart or choose the set for one pair of each weight. 1LB (white): 133 mm diameter x 11 mm thick 2.5LB (green): 160 mm x 15 mm 5LB (blue): 190 mm x 19 mm Tolerance +/- 10 g, matte finish, bold Gorila logo Sold in pairs or as a set Rubber-coated metal centers may show minimal wear with repeated use without affecting performance.