【Flexible Weight Options】Easily adjust each dumbbell from 4lbs to 45lbs by adding or removing plates. 【🏆Anti-Collision Silent Dumbbell Weight Plates with Unique Structure】 Are you concerned about injuries from falling weight plates or the unavoidable noise caused by dumbbells dropping from heights?The weight plates are made from high-quality PVC material, reinforced with an internal mix of iron sand and composite fillers.