3B?« Anatomical Model - Vertebrae Degeneration, Stages of Prolapsed DiscVertebrae Degeneration, Stages of Prolapsed Disc. Natural cast model illustrates degenerative changes to the vertebrae and intervertebral discs of the lumbar spine in five progressively serious degrees. From healthy disc and vertebrae all the way to very severe degeneration and bony constriction of the left intervertebral foramen with pressure on the spinal nerve root L5.9" length. Mounted on base. Product Specifications BRAND3B Scientific?« MANUFACTURERS PART NUMBER12-4542 LENGTH INCHES5-5/8 WIDTH INCHES7-1/8 HEIGHT INCHES6 WEIGHT LBS2 DESCRIPTIONVertebrae Degeneration, Stages of Prolapsed Disc TYPESpine Models PACKAGE QUANTITY1 LIMITED WARRANTY1 Year