The 3B Scientific A20 is a three-part adult human skull model that dissembles into skull cap, skull base, and mandible for easy display of cranial features. The A20 has an original human skull cast to provide accurate representation of fissures, foramina, processes, and sutures, and each tooth is individually cast to provide realistic dentition. The model is handmade of plastic for durability, and its mandible is spring mounted to demonstrate natural movement. Anatomical models are typically used as educational aids in medical and scientific classroom and office settings.

The model measures 20 x 13.5 x 15.5 cm/7.9 x 5.3 x 6.1 inches (H x W x D) and weighs 0.6 kg (1.32 lb.). (H is the vertical distance from the lowest to highest point; W is the horizontal distance from left to right; D is the horizontal distance from front to back.)

3B Scientific manufactures anatomical models, simulators, charts, and other training materials for use in scientific, medical, and patient education. Founded in 1948 and headquartered in Hamburg, Germany, 3B Scientific meets ISO 9001: 2008 standards.