This superb Tri-Grip Olympic Disc set comprises: 1.25kg Olympic Tri-Grip Plates (x 4) 2.5kg Olympic Tri-Grip Plates (x 4) 5kg Olympic Tri-Grip Plates (x 4) 10kg Olympic Tri-Grip Plates (x 4) Our Body Power cast iron plates are made to an incredibly high standard; with all products undergoing strict quality control. The casting quality; surface treatment & weight tolerance must meet a set standard of quality. Some of the cheaper alternatives that are available on the web are inferior products; which are not constructed to this same standard.