No Excuses. Whether you are a beginner or a fitness buff this product is perfect for you. FitnessLab’s Rubber Olympic Bumper Weight Plates is your best companion for those weight lifting workouts without having to worry about the floor or the plates themselves from breaking during those sudden drops. Compatible with Olympic sized barbell and dumbbell sleeves. Made of solid cast iron core and steel centre ring. Protected with high-quality durable rubber. It is made for heavy-duty use and abuse to keep up with your workout demands.