The Bel-Art VWR Lead Ring Flask Weights are essential for any laboratory setting. Designed to provide stability to flasks during experiments, these weights are made from high-quality lead, ensuring durability and reliability. Each weight features a smooth, flat surface that easily fits around various flask sizes, preventing tipping and spillage. With a total weight of 1 lb (approximately 0.45 kg), they are perfect for securing your glassware without compromising safety. Ideal for use in chemistry, biology, or any scientific research, these flask weights are a must-have for precise and accurate results.