These bumper plates are seriously well-made! The rubber coating is thick and durable, which means they're much quieter when you drop them and won't damage your floor like metal plates would. The inner diameter is precisely 50.6mm to fit perfectly on Olympic bars without wobbling. Available in 5kg, 10kg, 15kg, 20kg, and 25kg weights with thickness ranging from 34mm to 100mm depending on the weight. Each plate is calibrated to within +/- 1% of the stated weight, so you know you're lifting exactly what you think you are. The stainless steel sleeve insert prevents rust and ensures smooth spinning on the bar. The special profiling keeps them from turning on the pole during lifts - no more awkward plate adjustments between sets. The 45cm outer diameter gives them that professional look and feel. Whether you're building a home gym, outfitting a commercial facility, or just need reliable weights that won't annoy your neighbors, these deliver exceptional quality. They've got that perfect balance of durability and performance that serious lifters appreciate. The green color looks sharp and makes weight identification easy during intense workouts.