For the price if you don't need 20g accuracy they are perfect. However, they were all within 1 gram of 20. It also doesn't matter that they are unlabeled because it's obvious which is which as long as you have basic life experience with common metals.
π Musculoskeletal Anatomy Chart by Palace Learning
3 Review
π©Ί Anatomical Laminated Respiratory Circulatory Pack: Enhancing Understanding and Visualization for Medical Professionals
3 Review
Anatomical Chart of Spinal Nerves and Dermatomes
3 Review
𦴠Explore the Intricacies of Human Skeleton with the Movable Skeleton Anatomy Model
3 Review